上海市七宝中学2018学年高一上学期期末考试物理试题

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上海市2018-2019学年高一物理上学期期末试卷

上海市2018-2019学年高一物理上学期期末试卷

上海市2018-2019学年高一物理上学期期末试卷一、选择题1.如图所示,汽车在拱形桥上由A匀速率运动到B,以下说法正确的是( )A.牵引力与克服摩擦力做的功相等B.由A运动到B,汽车的运动状态不变C.合外力对汽车不做功D.牵引力和重力做的总功大于克服摩擦力做的功2.两个力大小分别为2N和4N,作用方向在同一直线上,则它们的合力大小可能()A.0 B.6N C.7N D.8N3.如图,a,b,c三根绳子,b绳水平,c绳下挂一重物. 受力最大的是A.a绳B.b绳C.c绳D.无法确定4.如图,弹性轻绳的一端套在手指上,另一端与弹力球连接,用手将弹力球以某一竖直向下的初速度抛出,抛出后手保持不动。

从球抛出瞬间至球第一次到达最低点的过程中(弹性轻绳始终在弹性限度内,不计空气阻力),下列说法正确的是()A.绳刚伸直时,球的动能最大B.该过程中,球的机械能守恒C.该过程中,重力对球做的功等于球克服绳的拉力做的功D.该过程中,轻绳的弹性势能和小球的动能之和一直增大5.下列公式中,既适用于点电荷产生的静电场,也适用于匀强电场的有①场强②场强③场强④电场力做功A.①③ B.①④ C.②③ D.②④6.如图,一个质量为m的刚性圆环套在粗糙的竖直固定细杆上,圆环的直径略大于细杆的直径,圆环的两边与两个完全相同的轻质弹簧的一端相连,轻质弹簧的另一端相连在和圆环同一高度的墙壁上的P、Q 两点处,弹簧的劲度系数为k,开始时圆环处于O点,弹簧处于原长状态且原长为l,细杆上的A、B两点到O点的距离都为l,将圆环拉至A点由静止释放,重力加速度为g,对于圆环从A点运动到B点的过程中,下列说法正确的是A.圆环通过O点的加速度小于gB.圆环与两弹簧组成的系统机械能不守恒C.圆环在O点的速度为D.圆环在B点的速度为27.物理学发展的过程中,许多物理学家的科学发现推动了人类历史的进步。

以下叙述中,正确的说法是()A.牛顿发现万有引力定律,并测出了万有引力常量B.爱因斯坦提出:在一切惯性参照系中,测量到的真空中的光速c都一样C.开普勒在牛顿万有引力定律的基础上,导出了行星运动的规律D.由爱因斯坦的质能方程可知,质量就是能量,质量和能量可以相互转化8.做曲线运动的物体,在运动过程中一定变化的物理量是A.动能B.动量C.合外力D.加速度9.一质量为m的物体,在外力作用下以大小为g的加速度竖直向上做匀加速直线运动,已知g为当地重力加速度。

上海市高一第一学期期末考试物理试卷含答案

上海市高一第一学期期末考试物理试卷含答案

上海市2018—2019学年度第一学期高一物理期末试卷一、单选题1.伽利略研究变速运动规律时做了著名的“斜面实验”:他测量了铜球在较小倾角斜面上运动的位移和时间,发现位移与时间的平方成正比,增大斜面倾角,该规律仍然成立.于是,他外推到倾角为90°的情况,得出结论()A.自由落体运动是一种匀变速直线运动B.力是使物体产生加速度的原因C.力不是维持物体运动的原因D.物体具有保持原来运动状态的惯性2.从牛顿第一定律可直接演绎得出()A.质量是物体惯性的量度B.质量一定的物体加速度与合外力成正比C.物体的运动需要力来维持D.物体有保持原有运动状态的特性3.如图所示,一人站在电梯中的体重计上,随电梯一起运动。

下列各种情况中,体重计的示数最大的()A.电梯匀减速上升,加速度的大小为1.0m/s2B.电梯匀加速上升,加速度的大小为1.0m/s2C.电梯匀减速下降,加速度的大小为0.5m/s2D.电梯匀加速下降,加速度的大小为0.5m/s24.用两条细绳把一个镜框悬挂在墙上,在如图所示的四种挂法中,细绳对镜框拉力最小的是()A. B. C. D.5.某人自河面竖直向上抛出一石子,石子上升到最高点后自由下落经过河水,并陷入河床底部的淤泥中的一段深度。

设每一段运动过程受的力都是恒力,表示运动过程的图象中可能正确的是()A. B.C. D.6.质量均为m的滑块A.斜面体C和滑块B如图所示放置,用力F推滑块A使三者无相对运动地向前加速运动,则各物体所受的合力()A.同样大C.B最大7.下图中按力的作用效果分解正确的是()B.A最大D.C最大A. B.C. D.8.某一质点沿直线运动的位移 x 随时间 t 变化的图象如图所示,则A. 第 10s 末,质点的速度最大B. 在 20s 内,质点的位移为 9mC. 第 5s 末和第 15s 末,质点的加速度方向相反D. 0-10s 内,质点所受合外力的方向与速度方向相反9.如图,圆弧形货架摆着四个完全相同的光滑小球,O 为圆心。

最新-2018学年第一学期宝山区高三期末考试试卷 精品

最新-2018学年第一学期宝山区高三期末考试试卷 精品

2018学年度第一学期高三物理期末测试卷班级姓名学号成绩考生注意:1.答卷前,考生务必将班级、姓名、学号、填写清楚。

2.本试卷共8页,满分150分。

考试时间120分钟。

考生应用钢笔或圆珠笔将答案直接写在试卷上。

3.第19、20、21、22、23题要求写出必要的文字说明、方程式和重要的演算步骤。

只写出最后答案,而末写出主要演算过程的,不能得分。

有数字计算的问题,答案中必须明确写出数值和单位。

重力加度g取10m/s2一、(40分)选择题。

本大题共8小题,每小题5分。

每小题给出的四个答案中,至少有一个是正确的。

把正确答案全选出来,并将正确答案前面的字母填写在题后的方括号内。

每一小题全选对的得5分;选对但不全,得部分分;有选错或不答的,得0分。

填写在方括号外的字母,不作为选出的答案。

1.下列叙述中正确的是()A.英国物理学家牛顿首先发现通电导线周围存在着磁场;B.英国物理学家法拉第经过多年的实验探索终于发现了电磁感应现象。

C.英国物理学家麦克斯韦从理论研究中发现真空中电磁波的速度跟真空中的光速相等。

D.德国物理学家赫兹利用莱顿瓶所做的实验发现了电磁波,证实了麦克斯韦的电磁理论。

2.设想如能创造一理想的没有摩擦的环境,用一个人的力量去拖一艘万吨巨轮,则从理论上可以说()A.巨轮惯性太大,所以完全无法拖动。

B.一旦施力于巨轮,巨轮立即产生一个加速度。

C.由于巨轮惯性很大,施力于巨轮后,要经过一段很长时间后才会产生一个明显的加速度。

D.由于巨轮惯性很大,施力于巨轮后,要经过足够长的时间才会产生一个明显的速度。

3.根据观测,某行星外围有一个模糊不清的环,为了判断该环是连续物质还是卫星群,测出了环中各层的线速度v的大小与该层至行星中心的距离R,以下判断中正确的是()A.若v2与R成正比,则环是卫星群。

B.若v2与R成反比,则环是卫星群。

C.若v与R成正比,则环是连续物质。

D.若v与R成反比,则环是连续物质。

4.如图所示,矩形线圈放置在水平薄木板上,有两块相同的蹄形磁铁,四个磁极之间的距离相等,当两块磁铁匀速向右通过线圈时,线圈仍静止不动,那么线圈受到木板的摩擦力方向是()A.先向左、后向右;B.先向左、后向右、再向左;C.一直向右;D.一直向左。

2018学年度第一学期高一物理期末试卷及答案(Word版)

2018学年度第一学期高一物理期末试卷及答案(Word版)

2018学年度第一学期高一物理期末试卷及答案(Word版)xx学年度第一学期期末试卷高一物理参考答案及评分标准xx、1A卷(100分)一、单项选择题(每小题3分,共30分。

)题号12345678910答案ADCDDBCBBC题号1112131415答案BCBCADABDACD二、多项选择题(每小题4分,共20分。

全部选对得4分,选对但不全得2分,错选不得分。

)三、填空题(每小题4分,共20分。

)16、200 ,4、017、5,18、,增大19、2、0 ,0、7020、2:1,砝码和盘的总质量远小于小车的质量四、计算题21、(6分)解:速度随时间均匀变化,即加速度不变的直线运动,叫做匀变速直线运动。

设做匀变速直线运动的物体的初速度为v0,经过时间t,速度变为v。

(2分)根据加速度的定义,其加速度(2分)则匀变速直线运动的速度与时间关系的公式为(2分)说明:只要思路清晰,表述上可从宽处理。

FθNmgf22、(12分)解:(1)冰车和小孩受力如图所示竖直方向上N+Fsinθ=mg支持力 N=188N (4分)(2)水平方向上Fcosθ-f=ma 摩擦力f=μN加速度 a = 0、33m/s2 (4分)(3)由解得 x=10、56m (4分)23、(12分)解:(1)滑块经第一个光电门时滑块经第二个光电门时滑块的加速度(6分)(2)向上运动的过程中,滑块的加速度a=v02=2ax解得 x=1、024m 因x<1、5m,所以滑块不能到达1、5m长的气轨的顶端。

(6分)B卷(20分)24、(4分)①5,1 ②250,越来越小F/Nx/cm00、51、01、52、02、53、02、04、06、08、010、012、025、(6分)(1)(3分)如图所示(2)(3分)① BC (只选其一得2分②弹簧弹力做的功说明:学生描点时用“”或“ ”均可。

26、(10分)解:(1)a、A、B、C一起做匀加速运动解得(4分)b、由牛顿第二定律对A T-Mg =Ma 对B和C Mg+mg-T =(M+m)a解得(6分)(2)a、由动能定理 A加速上升h的过程中① 绳子拉力对A做的功(4分)b、由动能定理,B和C加速下落h的过程中②① ②两式联立可得(6分)。

上海市上海中学2018-2019学年高一上学期期终物理试题无答案

上海市上海中学2018-2019学年高一上学期期终物理试题无答案

上海中学2018-2019学年高一上学期期终物理试题(满分100分,90分钟完成,答案一律写在答题纸上)班级__________学号___________姓名__________考生注意:1.全卷共6页,共26题.2.重力加速取10m/s2.3.第24、25、26题要求写出必要的文字说明、方程式和重要的演算步骤,只写出最后的答案,而未写出主要演算过程的,不能得分,有数字计算的问题,答案中必须明确写出数值和单位.一、单项选择题Ⅰ(共12分,每小题2分,每小题只有一个正确选项.答案涂写在答题纸上.)1.下列关于力的说法正确的是().A.合力必定大于分力B.运动物体受到的摩擦力一定与它们的运动方向相反C.物体间有摩擦力时,一定有弹力,且摩擦力和弹力的方向一定垂直D.静止在斜面上的物体受到的重力垂直于斜面的分力就是物体对斜面的压力2.关于惯性下列说法中正确的是()A.物体不受外力或合力为零时才能保持匀速直线运动状态或静止状态,因此只有此时物体才有惯性B.物体速度越大惯性越大,因为速度越大的物体越不容易停下来C.运动物体的加速越大,说明它的速度改变的快,因此加速大的物体惯性小D.物体惯性的大小由质量决定,与物体与物体运动状态、受力情况无关3.关于力学单位制,下列说法正确的是()A.Kg、N、m/s都是导出单位B.Kg、m、N是基本单位C.在国际单位制中,质量的基本单位是Kg,也可以是gD.在国际单位制中,牛顿第二定律的表达式才是F=ma4.关于伽利略对物理问题的研究,下列说法中正确的是()A.伽利略认为在同一地点重的物体和轻的物体下落快慢不同B.只要条件合适理想斜面实验就能成功C.理想斜面实验员虽然是想象中的实验,但它是建立在可靠的事实基础上的D.伽利略猜想自由落体的运动速度与下落时间成正比,并直接用实验进行了验证5.为了节省能量,某商场安装了智能化得电动扶梯,无人乘行时,扶梯运转的很慢:有人站上扶梯时,它会先慢慢加速,在匀速运转.一顾客乘扶梯上楼,恰好经历了这两个过程,那么下列说法中正确的是()A.顾客始终受到三个力的作用B.顾客始终处于超重状态C.顾客对扶梯作用力的方向先指向左下方,在竖直向下D.顾客对扶梯作用的方向先指向右下方,在竖直向下6.如图所示,一只重为的松鼠站在倾斜角为的树枝上,则树枝对松鼠的作用力为()二、单项选择题Ⅱ(共18分,每小题3分,每小题只有一个正确选项,答案涂写在答题纸上.)7、电梯内有一个物体,质量为,用细线挂在电梯的天花板上,当电梯以的加速数值减速下降时(为重力加速),细线对物体的拉力为()8.静止在水平面上的质量为的物体,受到水平力作用后开始运动,后撤去力,物体整个运动的速度图线如图所示.则物体受到的力大小为()9.物体静止在固体的斜面上,分别按图示的方向对物块施加大小相等的力,中垂直于斜面向上,中垂直于斜面向下,中竖直向上,中的竖直向下,施力后物块仍然静止,则物块所受的静摩擦力最大的是()10.物体从某一高度自由落下,落在直立于地面的轻弹簧上,如图所示,在点,物体与弹簧接触,到点时,物体速度恰为零,然后被弹回,则以下正确的是()A.物体从下降到的过程中,速度不断变小B.物体从上升到的过程中,速度不断变大C.物体在点时,所受合力为零D.物体从下降到,再从上升到的过程中,速率均先增大,后减小11.在光滑的水平地面上,与竖直墙平行放置着一个截面为圆的柱状物体,在柱状物体与墙之间放一光滑圆球,在柱状物体的右侧竖直面上施加一水平向左的推力,是整个装置处于静止状态,现将柱状物向左推过一段较小的距离,若使球与状物体仍保持静止状态,则与原来相比()A.推力变小B.地面受到的压力变小C.墙对球的弹力变大D.球对柱状物体的弹力变大12.质量为的物体在水平面上做直线运动,图中的两条直线表示物体受水平力和不受水平力两种情形下的图像,则下列说法正确的是()A.水平拉力大小可能等于B.水平拉力大小一定等于C.物体受到的摩擦力大小一定等于D.物体受到的摩擦力大小一定等于三、多项选择题(共16分,每小题4分,每小题有二个或三个正确选项.)13.将一个大小为的力分解为两个力,若一个分力大小为,则另一个分力的大小可能为()14.如图所示的装置中,增加的重力,仍然保持静止状态,则正确的是()A.悬挂滑轮的轴对滑轮的作用力一定增大B.绳子对的拉力增大C.地面对物体的摩擦力一定增大D.物体对地面的压力增大A.冲上过程的加速度比下滑时加速变大B.冲上过程后内位移比下滑时最初位移大C.冲上所需时间比下滑所需时间大D.冲上的平均速度比下滑的平均速度大16.一有固体斜面的小车在水平面做直线运动,小球通过细绳与车顶相连,小球某时刻正处于图示状态.设斜面对小球的支持力为,细绳对小球的拉力为,关于此时此刻小球的受力情况,下列说法正确的是()A.若小车向右做减速运动,则可能为零B.若小车向左做加速运动,则可能为零C.若小车向左做运动,则不可能为零D.若小车向右做运动,则可能为零四、填空题(共20分,每题4分.答案写在答题纸上对应题号后的横线上或指定位置.)17.如图所示为攀崖运动员,正在竖直攀崖上攀登,由于身背很重的行装,重心上移到肩部的点,总质量为.此时手臂与身体垂直.手臂与崖壁夹角为,若手受到的拉力和脚受到的作用力均通过重心,则此时手受到的拉力为_________,脚受到的作用力为__________.18.如图所示,、两个小球中间由轻质绳相连接,并用轻质弹簧悬挂在天花板上处于静止状态.其中球的质量是球的三倍.当将绳剪断的瞬间,、小球的加速度________、_____________;19.如图所示,重为的球放在倾角为的光滑斜面上,挡板与斜面间的夹角等于__________时,它所受球的压力最小,此时压力的大小为____________.20.如图所示,时,一小物体从光滑斜面上的点由静止开始下滑,经过点后进入水平面(设经过点前后速度大小不变)最后停在点.每隔测得的四个时刻物体的瞬时速度,记录在下表中.重力加速度取,则物体在斜面上的加速度为___________;物体经过所用时间为__________.21.如图(a)所示,倾角为的光滑斜面固定在水平面上,一物体在沿斜面向上的推力的作用下沿斜面向上运动,逐渐增大,物体的加速度随之改变,其加速度随变化的图像如图(b)所示,根据图(b)中所提供的信息可以计算出倾角为__________,物体的质量为____________.五、实验题(共10分.答案写在答题纸对应题号横线上或指定的位置处.)22.理想实验有时更能深刻的反应自然规律,如图所示,伽利略设计了一个理想实验:①如果没有摩擦,小球将上升到原来的高度;②继续减小右边斜面的倾角,最后使它成为水平面,小球要沿水平面作匀速直线运动;③减小右边斜面的倾角,小球在这斜面上仍然要达到原来的高度;④在两个对接的斜面上,让静止的小球沿左边的斜面滚下,小球将滚上右边的斜面.请将上述关于理想实验的描述按正确的逻辑顺序排列:______________(只要填写序号)23.如图为“用(位移传感器、数据采集器、计算机)研究加速度与力的关系”的实验装置⑴在该实验中必须采用控制变量法,应保持_____________不变,用钩码所受的重力作为____________,用测小车的加速度.⑵改变所挂钩的数量,多次重复测量,在某次实验中根据测得多组数据可画出关系图线(如图所示)①分析此图线得段可得出得实验结论是_____________________________________________________________________②(单选题)此图现得段明显偏高直线,造成此误差得主要原因是()A.小车与轨道之间存在摩擦B.导轨保持了水平状态C.所挂钩码的总质量太大D.所用小车的质量太大24、质量均匀分布在球重,置于竖直墙和支架之间,球半径,支架和墙之间的距离,各接触摩擦均不计.⑴试画出球的受力图;⑵求支架和墙对球的作用力.25.为了测量某住宅大楼每层的平均高度(层高)及电梯运行情况,甲、乙两位同学在一楼电梯内用电子体重计及秒表进行了以下实验,甲同学站在体重计上,乙同学记录电梯从地面到顶层全过程中,体重计示数随时间变化的情况,并作出了如下图所示的图像.已知时,电梯静止不动,从电梯内楼层按钮上获知该大楼共层.求:⑴电梯启动和制动时的加速度大小;⑵该大楼的层高.26.一质量为2kg的滑块能在倾角为300的足够长的斜面上以a=2.5m/s2匀加速下滑.如图所示,若用一水平推力作用于滑块,使之由静止开始在t=2s内运动的位移s=4m.求:(取)⑴滑块和斜面之间的动摩擦因数u;⑵推力F的大小。

上海市名校联考2018-2019学年高一物理上学期期末学业水平测试试题

上海市名校联考2018-2019学年高一物理上学期期末学业水平测试试题

上海市名校联考2018-2019学年高一物理上学期期末学业水平测试试题一、选择题1.物体受到三个共点力123F F F 、、作用,矢量关系如图所示,则它们的合力大小为A .0B .2FC .22FD .23F2.如图所示,为甲、乙两物体相对于同一坐标的x-t 图象,则下列说法正确的是( )A .甲、乙均做匀变速直线运动B .甲的速率大于乙的速率C .甲、乙运动的出发点相同D .甲比乙早出发时间t 03.下列图像中描述物体做匀速直线运动的是:A .B .C .D .4.质量m=200g 的物体,测得它的加速度a=20cm/s 2,则关于它所受的合力的大小及单位,下列运算既正确又符合一般运算要求的是A .F=200×20=4000N B.F=0.2×20=4NC .F=0.2×0.2=0.04 D.F=0.2×0.2 N =0.04N5.下列说法正确的是( )A .绳对物体拉力的方向总是沿着绳且指向绳拉伸的方向B .挂在电线下面的电灯受到向上的拉力,这是因为电线发生微小的形变而产生的C .拿一根细竹竿拨动水中的木头,木头受到竹竿的弹力,这是由于木头发生形变而产生的D .木块放在水平桌面上要受到一个竖直向上的弹力,这是由于木块发生微小形变而产生的6.自行车的大齿轮、小齿轮、后轮是相互关联的三个转动部分(如图),行驶时( )A.大齿轮边缘点比小齿轮边缘点的线速度大B.后轮边缘点比小齿轮边缘点的角速度大C.大齿轮边缘点与小齿轮边缘点的向心加速度与它们的半径成正比D.后轮边缘点与小齿轮边缘点的向心加速度与它们的半径成正比7.关于开普勒行星运动定律,下列说法正确的是()A.所有行星绕太阳运动的轨道都是圆,太阳处在圆的中心B.所有行星绕太阳运动的轨道都是椭圆,太阳处在椭圆的中心C.所有行星与太阳的连线在相等的时间内扫过相等的面积D.所有行星的轨道的半长轴的三次方跟它的公转周期的二次方的比值都相等8.用计算机辅助实验系统做验证牛顿第三定律的实验∶用一辆电玩具汽车拖运另一辆无动力的玩具汽车,在两车挂接处装上传感器探头,并把它们的挂钩连在一起. 当电玩具汽车通电后拉着另一辆车向前运动时,显示器屏幕上呈现相互作用力随时间变化的图像,如图所示。

上海市上海中学2018学年高一上学期期末考试物理试题

上海市上海中学2018学年高一上学期期末考试物理试题

上海中学2018学年第一学期期末试卷物理试题高一_________班学号________ 姓名________ 成绩_______________一、单项选择题(每题3分,共15分)1.关于动量和冲量的说法正确的是()A.动量是矢量,冲量是标量B.动量的方向和冲量的方向相同C.动量和冲量都是矢量D.动量是过程量,冲量是状态量2.咖利略通过斜面理想实验批驳了亚里士多德的观点,下列说法正确的是()A.物体维持运动不需要用力B.物体运动状态变化,不需要力C.物体受到力的作用,运动状态就会发生变化D.做匀速圆周运动的物体处于平衡状态3.对于做匀速圆周运动的物体,下列物理量时刻在变的是()A.周期B.转速C.角速度D.线速度4.物体A和B叠放在水平地面上,A、B两物体表面和地面均粗糙,现在A物体上加一向左的水平拉力F,使物体组向左做匀加速运动,以下说法正确的是()A.物体A受到三个力的作用B.物体B受到四个力的作用C.地面对B的支持力大于B的重力D.地面对B摩擦力方向向左5.用手提着一根挂有重物的轻弹簧,竖直向上做匀加速直线运动,当手突然停止运动瞬间,重物将()A.立即停止运动B.开始向上做匀速运动D.开始向上做减速运动D.继续向上做加速运动二、多项选择题(每题4分,共16分)6.以下关于作用力和反作用力的说法正确的是()A.作用力和反作用力总是同时产生同时消失B.作用力和反作用力的效果可以相互抵消C.走路时,脚对地面有作用力,地面给脚一个反作用力D.作用力和反作用力一定是同种性质的力7.一个系在地面的气球,在水平方向的风力作用下飘在空中保持平衡,如图所示。

以下说法正确的是()A.气球受到重力、绳子拉力和风力三个力的作用B.气球受到的重力小于它受到的浮力C.绳子对气球的拉力大于风对气球的作用力D.若风向不变而风力变大,绳子拉力一定变大8.质量为10kg 的木箱放在水平地面上,与地面之间的摩擦系数为0.3,某人先用与水平方向成30︒大小为60N 的力拉木箱前进,后改为斜向下与水平方向成30︒的大小为60N 的力推木箱前进,下列说法正确的是()2g=10m/s A .拉和推木箱时,木箱所受滑动摩擦力大小不同 B .拉木箱时滑动摩擦力大小为21N C .推木箱时滑动摩擦力的小大为30ND .如果改变推力的方向,有可能无论用多大的力都推不动木箱9.如图所示,质量为m 的小球放在夹角大于90︒,光滑斜槽中,当斜槽向右运动时,小球相对于斜槽止。

2018-2019学年上海市闵行区七宝中学高一年级上学期期末物理试卷

2018-2019学年上海市闵行区七宝中学高一年级上学期期末物理试卷

2018-2019学年上海市闵行区七宝中学高一年级上学期期末物理试卷一、单选题1. 已知7世纪意大利科学家伽利略在研究运动和力的关系时,提出了著名的斜面实验,其中应用的物理思想方法属于( )A. 等效替代B. 实验归纳C. 理想实验D. 控制变量【答案】C【解答】实验条件现实中无法达到2. 下列说法正确的是( )A. 矢量的大小是标量B. 位移的大小是路程C. 平均速度的大小是平均速率D. 瞬时速度的大小是瞬时速率【答案】D【解答】矢量的大小非负,标量有正有负。

平均速度的大小是位移和时间的比值,平均速率的大小是路程和时间的比值故选:D。

3. 下列哪组是国际单位中的基本单位( )A. 米,牛顿,千克B. 千克,米/秒2,秒C. 米/秒2,千克,牛顿D. 米,千克,秒【答案】D【解答】只能靠记忆,记不住就不会,没办法。

4. 关于摩擦力,以下说法中正确的是( )A. 运动物体可能受到静摩擦力作用,但静止物体不可能受到滑动摩擦力作用B. 摩擦力的存在依赖于正压力,其大小与正压力成正比C. 摩擦力的方向一定与物体的运动方向相反D. 摩擦力的方向有可能与速度方向不在一直线上【答案】D【解答】摩擦力和运动方向无关5. 如图所示是物体在某段运动过程中的v -t 图象,在t1和t2时刻的瞬时速度分别为v1和v2,则时间由t1到t2的过程中 ( )A. 加速度不断增大B. 加速度不断减小C. 平均速度2v v v 21+= D. 平均速度v >2v v 21+ 【答案】B【解答】加速度和倾斜率有关6. 关于惯性,以下说法中正确的是( )A. 水平拉动静止木块比水平拉着木块匀速运动所需的力大,所以静止物体惯性较大B. 同一木块速度大时不易停下,所以速度较大的物体惯性也比较大C. 木块在粗糙桌面上运动时较容易停下,所以物体受到的摩擦力越大惯性就越小D. 物体惯性的大小与是否受外力作用或外力大小均无关【答案】D【解答】惯性只和质量有关,所以D选项是正确的7. 如图所示,物体静止在一固定在水平地面上的斜面上,下列说法正确的是( )A. 物体对斜面的压力和斜面对物体的支持力是一对平衡力B. 物体对斜面的摩擦力和物体重力沿斜面的分力是一对作用力和反作用力C. 物体所受重力和斜面对物体的作用力是一对平衡力D. 物体所受重力可以分解为沿斜面的力和对斜面的压力【答案】C【解答】二力平衡8. 将甲乙两小球先后以同样的速度在距地面不同高度处竖直向上抛出,抛出时间相隔2s,它们运动的v-t图象分别如右图中直线甲、乙所示。

上海市实验学校2018学年高一上学期期末考试物理试题

上海市实验学校2018学年高一上学期期末考试物理试题


A.只有体积很小或质量很小的物体才可以看作质点
B.只要物体运动得不是很快,物体是就可以看作质点
C.质点是一种特殊的物体
D.物体的大小和形状在所研究的问题中起的作用很小,可以忽略不计是地,我们就可以把 物体看作质点
2.下列说法正确的是(

A.放在桌面上的木块对桌面的压力是由于木块发生微小形变而产生的
B.放在桌面上的木块所受到的向上的弹力是由于木块发生微小形变而产生的
C.用细竹竿拔动水中的木头,木头受到的竹竿的弹力是由于木头发生形变而产生的
D.挂在电线下面的电灯对电线的拉力,是因为电线发生微小形变而产生的 3.如图所示,表示物体做匀速直线运动( v 0 )的图像是( )
附加题 20 分
4.如图所示,甲、乙、丙、丁四个物体质量相同,与地面动摩擦因数相同,均受到大小相
6.一物体做匀加速直线运动,在第 1个 ts 内位移为 x1 :第 2 个 t s 内位移为 x2 ,则物体在第 1
个 ts ( )
A. x2 x1 / t
B. x2 x1 / t
C. x2 x1 / 2t
D. x2 x1 / 2t
7.一个物体在水平面上以恒定加速度运动,
速度为零的时刻是(

它的位移与时间的关系 S 24t 6t 2 ,则物体的
B.位移的大小可能大于 10m D.加速度的大小可能大于 10m/s2
11.如图,有同一平面内 5 个共点力,相邻的两个力之间的夹角都是 72 度, F1 大小为 90N ,
其余各力大小均为 100N ,则这 5 个力的合力大小为 __________ N 。方向为 __________。
12.木箱 A 静止在地面上,此时地面对 A 的支持力跟 __________力是一对平衡力,而地面 对 A 的支持力跟 __________力是一对作用和反作用力;

2020_2021学年上海闵行区上海市七宝中学高一上学期期末物理试卷及答案

2020_2021学年上海闵行区上海市七宝中学高一上学期期末物理试卷及答案

2020~2021学年上海闵行区上海市七宝中学高一上学期期末物理试卷一、单项选择题(本大题共12小题,共40分)1.A.B.C.D.下面涉及运动概念的几个说法,你认为哪一个是正确的( )凡轻小的物体皆可看作质点,而体积较大的物体都不能看作质点“质点”、“匀速直线运动”等概念建立所用研究方法是物理模型法电动自行车限速,指的是平均速度质点的速度变化越大,则加速度越大2.A.重力B.弹力C.摩擦力D.阻力下列各力中属于按力的效果命名的是( )3.A.米尺、弹簧秤、秒表B.米尺、弹簧秤、光电门C.量筒、天平、秒表D.米尺、天平、秒表可以用来测量国际单位制规定的三个力学基本物理量的仪器是( )4.A.B.C.D.关于伽利略的两个斜面实验,下面说法中正确的是( )伽利略在图(a )中使用了光滑斜面进行实验伽利略在图(b )中使用了光滑斜面进行实验伽利略从图(a )中得出:自由落体运动是匀加速直线运动伽利略从图(b )中得出:力是维持物体运动的原因5.A.火车在水平的长直轨道上匀速运动,门窗紧密的车厢里有一位旅客竖直向上跳起,结果仍然落在车厢地板上的原处,原因是( )人跳起的瞬间,车厢地板给他一个向前的力,使他与火车一起向前运动B.C.D.人跳起后,车厢内的空气给他一个向前的力,使他与火车一起向前运动人在跳起前、跳起后直到落地,沿水平方向人和车始终具有相同的速度人跳起后,车仍然继续向前运动,所以人落回地板后确实偏后一些,只是离地时间短,落地距离太小,无法察觉而已6.A.,竖直向上B.,东北偏上方向C.,东北偏上方向D.孔明灯又叫天灯,相传是由三国时的诸葛孔明所发明.现有一孔明灯升空后向着东北偏上方向匀速上升(如图所示),孔明灯质量为,重力加速度为,则此时孔明灯所受空气的作用力大小和方向是( )7.A.一定向上B.一定向下C.可能向上或向下D.没有方向在足够高的空中某点竖直上抛一物体,抛出后第内物体的位移大小为,设物体抛出时的速度方向为正方向,忽略空气阻力的影响,取.则关于物体第末的速度方向,下列说法正确的是()8.A. B. C. D.体育器材室里,篮球摆放在图示的球架上.已知球架的宽度为,每只篮球的质量为、直径为,不计球与球架之间摩擦,则每只篮球对一侧球架的压力大小为( )9.、两质点从同一点开始沿直线运动,图中的①、②分别为二者的图象,则下列判断中正确的是( )A.时,质点的运动方向发生变化B.时,、两质点间的距离等于C.时,、两质点间的距离最大D.时,、两质点相遇10.A.B.C.D.某跳水运动员在长的踏板上起跳,我们通过录像观察到踏板和运动员要经历如图所示的几个位置,其中为无人时踏板静止点,为人站在踏板上静止时的平衡点,为人在起跳过程中人和踏板运动的最低点,已知板形变越大时板对人的弹力也越大,则下列说法正确的是()人和踏板由到的过程中,人向上做加速度增大的加速运动人和踏板由到的过程中,人处于失重状态人和踏板由到的过程中,人处于失重状态人和踏板由到的过程中,人处于超重状态11.A.大小不变B.方向改变C.仍然为零D.方向向左如图所示,将两相同的木块、置于粗糙的水平地面上,中间用一轻弹簧连接,两侧用轻细绳固定于墙壁.开始时、均静止.弹簧处于伸长状态,两细绳均有拉力,木块所受摩擦力,木块所受摩擦力,现将右侧细绳剪断,则剪断瞬间( )12.如图所示,光滑的斜槽由槽板、组成,与的夹角大于,质量为的球放在斜槽中,当斜槽和球一起沿水平面向右运动的过程中( )A.球对槽板的压力不可能大于B.球对槽板的压力不可能等于零C.球对槽板的压力可能大于D.球对槽板的压力可能小于二、填空题(本大题共5小题,每小题4分,共20分)13.加速度是表示速度变化快慢的物理量.加速度的定义式是:.加速度的决定式是:.14.一物体从一行星表面某高度处自由下落(不计阻力).自开始下落时计时,得到物体离行星表面高度随时间变化的图像如图所示,则根据题设条件计算出行星表面重力加速度大小为,物体落到行星表面时的速度大小为.15.雨滴下落时所受到的空气阻力与雨滴的速度成正比,还与雨滴半径的二次方成正比.假设一个大雨滴和一个小雨滴从同一足够高的云层同时下落,最终它们都(填“加速”、“减速”或“匀速”)下落.接近地面时,(填“大”或“小”)雨滴的速度较小.(雨滴可近似看作球形,球的体积为)16.已知电梯在时由静止开始上升,图如图所示.根据加速度和速度的定义,类比教科书中讲解由图像求位移的方法.则电梯在第内速度改变量为;以最大速率上升的距离为.17.如图所示,两细绳与水平的车顶面的夹角为和,物体的质量为.当小车以大小为的加速度向右匀加速运动时,绳的拉力大小为、绳的拉力大小为.传感器的部分.该实验采用控制变量法,应保不变,通过改变来改变对小车的拉力,通过传感器测得小车的图得到小车的加速度.改变所挂钩码的数量,多次重复测量.在某次实验中根据测得的多组数据可画出关系图所示).此图线的段明显偏离直线,造成此误差的主要原因是()缓慢拉起小球,已知物体的重力为,(1)(2)当绳与竖直方向夹角为时,两根绳子对小球的拉力、的大小.若绳的最大承受力为,则为使绳不断,缓慢拉动小球过程中,绳与竖直方向夹角的范围.20.(1)(2)(3)用同种材料制成倾角的斜面和长水平面,斜面长且固定,一小物块从斜面顶端以沿斜面向下的初速度开始自由下滑,当时,经过后小物块停在斜面上.多次改变的大小,记录下小物块从开始运动到最终停下的时间,作出图像,如图所示,求:小物块在斜面上下滑的加速度为多少?小物块与该种材料间的动摩擦因数为多少?某同学认为,若小物块初速度为,则根据图像中与成正比推导,可知小物块从开始运动到最终停下的时间为.以上说法是否正确?若不正确,请说明理由,并解出你认为正确的结果.2020~2021学年上海闵行区上海市七宝中学高一上学期期末物理试卷(答案)。

2017-2018学年上海市闵行区七宝中学高一下学期期末考试物理试卷

2017-2018学年上海市闵行区七宝中学高一下学期期末考试物理试卷

2017-2018学年上海市闵行区七宝中学高一下学期期末考试物理试卷一、单选题1. “隔墙有耳”说明声波可以绕过障碍物,这是声波在传播过程中发生了( )A. 衍射B. 折射C. 干涉D. 反射【答案】A【解答】衍射与干涉是波特有的现象;波能绕过阻碍物继续向前传播的现象为光的衍射,故A正确2. 一定质量的物体在做匀速圆周运动过程中,所受到的合外力( )A. 大小为零B. 方向变化C. 大小变化D. 保持恒定【答案】B【解答】一定质量的物体在做匀速圆周运动过程中,所需要的向心力由合外力提供,因此,合外力的方向时刻指向圆心;再由牛顿第二定律可得:,因为速度的大小不变且不为零,故合外力的大小不变也不等于零;因为合外力是矢量,虽然大小没变,但方向变了,从整体看合外力是个变量。

故B正确3. 下列已知数据可以算出阿伏伽德罗常数的是 ( )A. 水的密度和水的摩尔质量B. 水的摩尔质量和一个水分子水的体积C. 一个水分子的质量和水的摩尔质量D. 一个水分子的体积和一个水分子的质量【答案】C【解答】A知道水的密度和水的摩尔质量可以求出其摩尔体积,不能计算出阿伏伽德罗常数,故A错误;B若知道水的摩尔质量和水的体积,不能求出水分子的质量或分子体积,所以不能求出阿伏伽德罗常数,故B错误。

C知道水的摩尔质量和水分子质量,两者之比能求出阿伏伽德罗常数,故C正确。

D知道水分子的体积和水分子的质量,不能求水的摩尔质量或摩尔体积,所以不能求出阿伏伽德罗常数,故D错误4. 电脑中用的光盘驱动器,采用恒定的角速度驱动光盘,光盘上凸凹不平的小坑是存储的数据,请问激光头在何处时,电脑读取数据速率比较大()A. 内圈B. 外圈C. 中间位置D. 与位置无关【答案】B【解答】同一光盘,由于共轴,则角速度相等,由得,当半径越大时,转动的速度也越大。

即外圈半径大,线速度就大,读取数据速率就大。

故B正确,ACD错误5. 如图所示,O是弹簧振子的平衡位置,小球在B、C之间做无摩擦的往复运动,则小球每次经过O点可能变化的物理量是( )A. 速度B. 机械能C. 回复力D. 加速度【答案】A【解答】小球做简谐运动,系统机械能守恒。

上海市七宝中学2024年高三物理第一学期期末质量检测试题含解析

上海市七宝中学2024年高三物理第一学期期末质量检测试题含解析

上海市七宝中学2024年高三物理第一学期期末质量检测试题考生须知:1.全卷分选择题和非选择题两部分,全部在答题纸上作答。

选择题必须用2B 铅笔填涂;非选择题的答案必须用黑色字迹的钢笔或答字笔写在“答题纸”相应位置上。

2.请用黑色字迹的钢笔或答字笔在“答题纸”上先填写姓名和准考证号。

3.保持卡面清洁,不要折叠,不要弄破、弄皱,在草稿纸、试题卷上答题无效。

一、单项选择题:本题共6小题,每小题4分,共24分。

在每小题给出的四个选项中,只有一项是符合题目要求的。

1、在物理学发展过程中,有许多科学家做出了突出贡献,关于科学家和他们的贡献,下列说法正确的是( ) A .胡克用“理想实验”推翻了亚里士多德的“力是维持物体运动的原因”的观点 B .平均速度、瞬时速度和加速度等描述运动所需要的概念是牛顿首先建立的 C .伽利略利用小球在斜面上运动的实验和逻辑推理研究出了落体的运动规律 D .笛卡尔发现了弹簧弹力和形变量的关系2、一足够长的传送带与水平面的倾角为θ,以一定的速度匀速运动,某时刻在传送带适当的位置放上具有一定初速度的小物块,如图甲所示,以此时为计时起点t =0,小物块之后在传送带上运动速度随时间的变化关系如图乙所示,图中取沿斜面向上的运动方向为正方向,v 1>v 2,已知传送带的速度保持不变,则( )A .小物块与传送带间的动摩擦因数μ<tanθB .小物块在0~t 1内运动的位移比在t 1~t 2内运动的位移小C .0~t 2内,传送带对物块做功为22211122W mv mv =- D .0~t 2内物块动能变化量大小一定小于物体与皮带间摩擦而产生的热量3、为了抗击病毒疫情,保障百姓基本生活,许多快递公司推出了“无接触配送”。

快递小哥想到了用无人机配送快递的方法。

某次配送快递无人机在飞行过程中,水平方向速度V x 及竖直方向V y 与飞行时间t 的关系图像如图甲、图乙所示。

关于无人机运动说法正确的是( )A .0~t 1时间内,无人机做曲线运动B .t 2时刻,无人机运动到最高点C .t 3~t 4时间内,无人机做匀变速直线运动D .t 2时刻,无人机的速度为2202v v 4、如图(俯视图),在竖直向下、磁感应强度大小为2T 的匀强磁场中,有一根长0.4m 的金属棒ABC 从中点B 处折成60°角静置于光滑水平面上,当给棒通以由A 到C 、大小为5A 的电流时,该棒所受安培力为A .方向水平向右,大小为4.0NB .方向水平向左,大小为4.0NC .方向水平向右,大小为2.0ND .方向水平向左,大小为2.0N5、已知长直导线中电流I 产生磁场的磁感应强度分布规律是B =Ik r (k 为常数,r 为某点到直导线的距离)。

2018-2019学年上海市闵行区七宝中学高一第一学期10月月考卷(含答案和分析版)

2018-2019学年上海市闵行区七宝中学高一第一学期10月月考卷(含答案和分析版)

2018-2019学年上海市闵行区七宝中学高一第一学期10月月考卷(含答案和分析版)Ⅱ. Grammar(15分)Section A Multiple choice21.It is the first time that I_____such a wonderful building.A.sawB. is seeingC. have seenD. had seen【答案】C【分析】考查固定搭配句型It is the first/second/third... time that+现完从句,故选C22.The year 2002 _____ remarkable changes in Shanghai’s landscape.A.seesB. has seenC. sawD. had seen【答案】C【分析】2002这一年为单数,在2002年见证上海风景引人注目的变化,故选C23.Efforts to stop smoking in public areas ______ in Hangzhou in recent weeks.A.madeB. have been madeC. have been makingD. are making【答案】B【分析】主语为efforts,to stop smoking in public ares为不定式做后置定语来修饰,in recent weeks要用现完,故选B24.Mary ______ as a photographer for five years in the club, and now she is the CEO.A.has servedB. had servedC. servedD. serves【答案】C【分析】现在是CEO,所以前面不能用现完,现完是以后还会继续保持,故选C 25.“A man who ______ fault with others is not perfect himself, for he has no time to make a self-criticism.” said Buddha.A.always foundB. is always findingC. has always foundD. had always found【答案】B【分析】现在进行时+always表示“总是,经常”,常带有抱怨语气,故选B26.How long do you think it will be before another aircraft carrier______ in China?A.buildB. will buildC. is builtD. will be built【答案】C【分析】考查句型It will be +一段时间+before+一般现在时,another aircraft carrier是被建造,故选C27.People generally think that fairness and justice are at the center of______they are striving for.A.howB. whyC. whichD. what【答案】D【分析】what引导的宾语从句,故选D28.---I have a sore throat today!---You’d better take advantage of the tea break to go to ______.A.chemist’sB. the chemistC. the chemist’sD. the chemists’【答案】C【分析】the chemist’s表示诊所,故选C29.Never before ______ in greater need of modern public transport than it is today.A.has this city beenB. this city has beenB.was this city D. this city was【答案】A【分析】before要用现完,Never提前要用部分倒装,故选ASection BDirections: Read the following passage. For the blanks with a given verb, fill in each blank with the proper form of the given verb. Make sure that your answers are grammatically correct.This Is Why You Should Never, Ever Use the Hotel Hair DryerIt will take more than the average bottle of hand sanitizer to avoid ___30___(get) sick on your next vacation. Can you guess the biggest hygiene(卫生的)problem during your trip? Surprisingly, it isn’t germy(带有细菌的)public restrooms. When it comes to staying healthy on the road, you might want to start with where you sleep.Yes---your hotel room___31___(host) invisible germs(细菌)and bacteria. And according to an investigation by ABC, you should be particularly concerned with the germs in your hair dryer.Cooperating with microbiologist Chuck Gerba, ABC__32__(collect) items in nine different Los Angeles-area hotels. In terms of hygiene, hair dryers turned out to be the dirtiest. “There must be something you can do with a hair dryer that I am not aware of, because some of them were pretty germy.” Gerba said.Although state laws require that hotels clean the obvious areas like toilets and drinking glasses, the same can’t be said for less evident items such as hair dryers. As a result, those items__33__(not clean) by house keeping as often, and most could go days, weeks, months, or even years without ever being disinfected(消毒).Unfortunately, even those willing ___34___(spend) out a couple hundred bucks for a luxury suite can’t rest easy. The hotels used in the experiment ranged in price from $98 to $500 per night---and they all came up short for cleanliness.That isn’t the only germ-ridden spot in your hotel room, either. New research recommends that everyone never, ever take a bath in a hotel tub. Looks like we__35__(wipe) down(擦干净) our entire hotel room from now on.【答案】30.getting 31.hosts 32.collected 33.aren’t cleaned 34.to spend 35.will wipe【分析】30.缺avoid的宾语,avoid doing sth.,避免生病,故填getting31.缺your hotel room的谓语,讲述的是现在的一个事实,故填hosts32.缺ABC的谓语,后面谓语用的是turned过去,故填collected33.缺those items的谓语,后面有by,是没有被清理,故填aren’t cleaned34.be willing to do,故填to spend35.缺we的谓语,后面有from now on从现在起,用将来时,故填will wipeⅡ.Vocabulary (30分,1.5分一题)Directions: Complete the passage with the words given in the table. Each word can be used only once. There is an extra one that you will find no use for.Body languagewould probably think that the father was___36__ his son on doing something well, maybe passing an exam or winning a race. You would know what was going on because you understood the messsage __37__ by the father’s body language. Across the world, a pet on the back and a smile usually means “well done”.Body language is used every single day by people of different nationalities all over the world. It is a language without words that consists of gestures, facial expressions and body movements that greatly add to ---and sometimes even replace---spoken language. Body language is used to __38__both attitudes and feelings from affection to anger just like any other language, but it differs from spoken language as it is not always explicit. Somebody jumping for joy is easy to see while a(n)__39__eyebrow conveying doubt is easier to miss.Learning to be aware of your body language can be a very useful tool. For example, in a job interview, you will probably be feeling ___40___but you won’t want to appear to be in a stay of being unrest. You will want to appear calm with as much dignity as possible. Merely by uncrossing your arms, you will look more confident.Body language can be very useful when people do not share a common spoken language. For example, in foreign countries, it is very easy to ___41___something simply by smiling and pointing at what you want. On the other hand, you can also easily show what you don’t like by shaking your head. You can negotiate the price by using your fingers and even ask questions by using your hand to outline the shapes of things you want---although this can cause___42___and a few laughs too!However, body language can sometimes be ambiguous. Although every culture around the world uses the same gestures and expressions, they use them in __43__ ways. For example, an American tourist at a German hotel might give an “OK”sign by making a circle with his fingers. Unlike in American where this sign means everything is fine, in German, this gesture can cause__44__. Another example is that in most cultures to nod one’s head means “no” while in some cultures the___45__is true!Regardless of these differences, experts agree that across the globe there is one form of body language that receives universal approval--the smile. Smiling has a high success rate so never be afraid to use it---even when you’re nervous ---and especially in foreign countries!【答案】36.D 37.BD 38.BC 39.B 40.AC 41.C 42.ABC 43.AD 44.CD 45.A【分析】36.was doing sth.,“爸爸正在恭喜他的儿子做了一些较好的事情”,故选D,congratulate sb on sth,因某事恭喜某人37.done做后置定语,“因为你可以理解被爸爸的肢体语言所传送的那个信息”,故选BD,convey传送,输送38.be used to do被用来做某事,缺动词原形,“肢体语言就像任何一种语言,被用来沟通态度和感觉,从喜爱到愤怒”,故选BC,communicate沟通,交流39. a...eyebrow,缺形容词,“一个上扬的眉毛传送着怀疑,这点容易被错过”,故选B,raise抬起40.feel+adj.,缺形容词,“举个例子,在一场工作的面试中,你可能会感到紧张”,故选AC,nervous紧张的41.It is easy to do,缺动词原形,“举个例子,在国外,通过微笑和指向你想要的东西,这样就很容易购买物品”,故选C,purchase购买42.cause sth,缺名词,“尽管这会引起疑惑和一些笑话”,故选ABC,confusion疑惑43.in...ways,缺形容词,“用不同的方式去使用他们”,故选AD,different不同的44.cause sth,缺名词,“在德国,这个手势会引起冒犯”,故选CD,offence冒犯45.the后面缺名词,“在某些文化中相反的意思才正确”,故选A,opposite对面的Edson Arantes do Nascimento, or as the world knows him, Pele (1940-), is thought by many to be one of the greatest ever soccer players.The Brazilian star is ___46___ as the brightest light of the wonderful Brazilian national teams of the 1960s. To his hundreds of fans, his ball skills made him seem more like a magician(魔术师) than a sportsman.But Pele played his final match for Brazil in 1971, nearly half a century ago, ___47___ that some young people today may not know who this man is. If so, that is a ___48___, since not only should his amazing talents never be forgotten, but his ___49___ life and character should be remembered too.___50___ there is now a movie about exceptional individual. Pele: Birth of Legend, which came out in Chinese mainland cinemas on Sep 7, ___51___ on the early life of Pele up to the 1958 World Cup.In spite of his later fame (名气), Pele grew up in poverty. His mother worked as a maid and, as a kid, Pele contributed to(贡献)the family by serving in teashops. In his childhood, Pele was so poor that his only toy was a stone in a sock, and he was often laughed at by other kids. Without a ___52___ Pele was in part motivated(激发) to show people that he was more than just a boy from a poor family.The 1950 World Cup, which ___53___ Brazil beaten by Uruguay, also led to Pele’s determination to turn things around for his national team. And as a new player for Brazil in the 1958 World Cup, the ___54___ Pele finally put things right for his country.Pele: Birth of a legend shows all the trials and the tribulations of a young Pele. To be sure, Pele had bags of natural talent, but without the ___55___ and perseverance(毅力)to deal with all the problems life threw in his path , he would never have succeeded. His achievement is a monument (丰碑) to willpower. As a mentor(导师) in the movie Pele as a child, if “you want to play professionally, you cannot be ashamed of who you are.”【答案】46.CD 47.A 48.C 49.ABC 50.AC 51.BC 52.B 53.BD 54.AB 55.D【分析】46.“被纪念为”,故选CD,be remembered as47.“但是Pele最后一场比赛是在1971年,几乎半个世纪以前,意味着如今很多年轻人都不太知道这个人是谁”,故选A,mean意味着48.接上文“如果真是这样,那真的很遗憾”,故选C,shame遗憾49.his...life,缺形容词,这个球星的一生应该是卓越的,故选ABC,remarkable卓越的,非凡的50.缺副词,上文说“很多现在的年轻人不知道他,但幸运的是,有一部关于他的电影”,故选AC,fortunately幸运地是51.这句话主语是Pele:Birth of a Legend,后面是which引导的非限制性定语从句,此空缺谓语,后面是介词on,这部电影是集中于Pele的早起生活,故选BC,focus on集中于52.“毋庸置疑,Pele在某方面是被刺激展示出他不仅仅是一个穷人家的小孩”,故选B,doubt怀疑,without a doubt毋庸置疑53.which引导的定语从句缺谓语,先行词是the 1950 World Cup,“那场见证了巴西被乌拉圭打败的1950年的世界杯也同样导致了Pele的决心”,故选BD,see见证54.缺形容词,有天赋的Pele,故选AB,talented有天赋的55.缺名词,“没有决心和毅力”,故选D,determination决心IV. Close(15分)Direction: For each blanks in the following passage there are four words or phrases marked A, B, C, D. Fill in each blank with the word or phrase that best fits the context.What is a vegan? What is veganism?Veganism is a type of vegetarian diet that ___56___ meat, eggs, daily products and all other animal-derived ingredients. Many vegans also do not eat foods that are ___57___ by using animal products, such as refined white sugar and some wines.Vegan ___58___ either a person who follows this way of eating, or to the diet itself. That is, the word vegan can be an adjective used to describe a food item, as in,” This curry is vegan”, or ,it can be used as a noun, as in, “Vegans like cookies, too.”Although there is some ___59___ as to whether certain foods , such as honey, fit into a vegan diet, if you are cooking for other vegans, it is best to be cautious and ___60___ these foods. Most vegans ___61___ the definition of veganism to go beyond just food and will also avoid the use of all personal and household products tested on animals, and avoid ___62___ and suing all animal-derived non-food products, such as leather, fur and wool.What do vegans eat?This is perhaps the most common question about veganism. A vegan diet includes grains, beans, legumes, vegetables and ___63___ the nearly infinite number of foods made by combing them.___64___, many vegan versions of familiar foods are available, so you can eat vegan hot dogs, ice cream, cheese and vegan mayonnaise along with the more familiar veggie burgers. Many foods are ___65___ veganism, such as soy milk and tofu, but many non-vegans also enjoy tofu, and you certainly do not have to like tofu in order to eat vegan.Vegans also eat many of the same common and ___66___ every day foods such as a green salad, spaghetti, and chips and salsa which just about everyone eats. ___67___, foods such as a vegetarian burrito without cheese or sour cream would be vegan, a vegetarian Thai curry made from coconut milk is vegan, pasta with tomato sauce non-meat and non-diary sauce is vegan, and most breads are vegan.How can I become vegan?So you have decided to become vegan. But now what? Some people easily go from eating meat to vegan right away, while others struggle with their new ___68___, or choose to go to vegetarian first and then ___69___ omit(去除) eggs and dairy. There is no right or wrong way to do it, but you may want to learn about what’s worked for other people. However, you do it, keep your ___70___ in mind and remember why you are choosing to adopta vegan diet.56.A. excludes B. includes C. involves D. favors57.A. enjoyed B. consumed C. proceeded D. frozen58.A. protests against B. refers to C. consists of D. searches for59.A. analysis B. reason C. debate D. comment60.A. cook B. choose C. test D. avoid61.A. extend B. apply C. restrict D. offer62.A. controlling B. purchasing C. distributing D. producing63.A. eggs B. cheeses C. hot-dogs D. fruits64.A. Otherwise B. However C. Besides D. Thus65.A. separated from B. ignored by C. associated with D. limited to66.A. cheap B. familiar C. delicious D. healthy67.A. As a result B. In a sense C. In a sense D. In particular68.A. belief B. mission C. commitment D. trend69.A. slowly B. easily C. essentially D. normally70.A. goal B. request C. responsibility D. expense【答案】56-60 ACBCD 61-65ABDCC 66-70BBCAA【分析】56.A选项:排除;B选项:包括;C选项:涉及;D选项:支持.Veganism is a type of vegetarian diet that…meat,eggs,dairy products and all other animal-derived ingredients.句意为:纯素食主义是一种…肉类,蛋类,奶制品和其他所以含有动物成分的素食.可知应为"排除"肉类等食物的素食.故选A57.A选项:享受;B选项:消耗;C选项:处理,加工;D选项:结冰,凝固.根据Many vegans also do not eat foods that are…using animal products 许多严格的素食主义者也不吃那些用动物产品…的食物,再结合选项,可知应为用动物食品加工的食物.故选C58.A选项:抗议;B选项:引用;C选项:抱怨;D选项:搜索.句意为:严格的素食主义者要么是引用一个人严格遵守吃的方式或是食物的本身.就是说:素食主义者这个词可以是一个用来表示食物的形容词…可知故选B.59.A选项:分析;B选项:原因;C选项:辩论;D选项:评论;意见;批评.句意为:虽然还是有一些像是对是否是指确切的食物的争论,比如蜂蜜是否符合纯素食.可知故选C60.A选项:烹饪;B选项:选择;C选项:试验;D选项:避免.结合语境语义,可知句意为:最好是小心避免这些食物,故选D61.A选项:延伸;扩大;推广;B选项:申请;涂,敷;适用;请求;C选项:限制;约束;限定;D选项:提供.句意为:许多素食主义者…素食主义定义指的不仅仅是食物还有避免任何用个人的和家用产品的在动物身上的操作.可知应该是扩展了它的定义.故选A62.A选项:控制;B选项:购买;C选项:分配;D选项:生产.结合语境语义,可知句意为:避免…和使用动物非食物产品,比如皮革、毛皮和羊毛.可知应该是避免购买…,故选B63.A选项:鸡蛋;B选项:奶酪;C选项:热狗;D选项:水果.句意为:素餐可包括谷物、豆类,豆类,蔬菜和…,可知选项中只有水果不是肉类,故选D64.A选项:另外的;其他方面的;B选项:然而;C选项:除此之外;D选项:因此.结合语境语义,可知此处应表示顺承关系,所以应该是"除此之外,还有",故选C65.A选项:分开;B选项:忽视了;C选项:与,有关联,结交;D选项:限制于.结合语境语义,意为:还有许多食物和素食相关联,比如豆奶和豆腐.故选C66.A选项:便宜的;B选项:熟悉的;常见的;C选项:美味的;D选项:健康的.结合空前面的common 可知选项中只有familiar能与之相照应,故选B67.A选项:结果;B选项:比如;C选项:在某种意义上,;D选项:尤其是.根据空后面的:比如像没有奶酪的素食卷饼或者是酸奶酪等食物,可知此处试举例说明,故选B68.A选项:乐趣;高兴;B选项:服务,服侍;C选项:承诺,保证;D选项:趋势,倾向.句意为:有些人很容易就从肉食上过渡到素食上,然而其他人还在与他们的新的承诺挣扎着,结合语境可知答案应选C69.A选项:缓慢地;B选项:意外地;偶然地;C选项:本质上;本来;D选项:正常地;通常地.根据语境语义知首先选择素食然后再慢慢的戒掉蛋类和奶制品.故选A70.A选项:目的;B选项:要求;C选项:责任,;D选项:消费;开支.句意为:要牢记你的…并记住你为什么要选择素餐.可知应该是记住你的目的,故选AV. Reading comprehension (共40分)(A)When my old dog developed major health problems , I knew that watching him fail would be painful, but Was not prepared for the powerful lessons he would offer in the last year of his life.Chance was 14 when the problems started. First, he developed a cancer that left him whistling for breath. Then came cataracts(白内障)in both eyes, arthritis(关节炎)in his legs, and a series of ministrokes (小中风) that threw off his balance. Any one of these misfortunes would have left me begging for relief, but Chance became calmer as the disabilities piled up.When leg pain left him frozen on the floor, unable to rise for a quick pat as I came home, he didn’t complain. He just lay there patiently, signaling me with his hammering tail, each movement spelling out the value of waiting for the things you want. When his cataracts made steering impossible after dark, he’d stand calmly until I could guide him inside, proving how easy it is to find happiness if you let go of your pride and insecurities and learn to lean on those who love you. When mini strokes had him walk unsteadily like a drunk, he taught the value of persistence . For days after each attack, he’d fall as he moved about. Yet again and again he would try to walk, each day moving a few more steps until finally he was able to get outside and back by himself.There were lessons in so much of what he did, but the key one surely was the importance of obtaining all the joy possible from each experience whether it is a day lazing under a warm sun or a few minutes appreciating a favorite meal.For most of our life together, chance was always rushing ahead, searching out new adventures, then circling back to let me know what lay around the next bend. As an old dog, he did the same thing, using his attitude, instead of his once-fast legs, to show the way.71.Chance suffered very much from all the diseases he had except for .A.having problem with breathB.walking around awkwardlyC.having trouble drinkingD.losing his eyesight in darkness72.is the most important lesson the author learned from Chance.A.Living in the present and enjoying what we haveB.Learning to depend on those who we love and trustC.That we should expect good things to happen patientlyD.That we should persevere in what we believe is worth trying73.It is implied in the passage that .A.people might suffer from different diseases when they grow oldB.people could face aging with courage and dignityC.Pets would become calmer for lack of energy in their last daysD.Pets and masters should stick together helping each other in difficulty74.Which of the following words best describes the author’s feeling to Chance?A. BitterB. GratefulC. ResponsibilitiesD. Sympathetic【答案】71-74 CABB【分析】71.根据文章第二段描写的,白内障,关节炎,小中风,故选C72.根据文章第四段描写的,the importance of obtaining all the joy possible from...meal可知,要享受当下,故选A73.全文描写了Chance变老后的一些痛苦,但是它很勇敢地去接受和面对,故选B74.作者对Chance教会他的一些动词表示感激,故选B(B)Suppose you work in a big firm and find English very important for your job because you often deal with foreign businessmen. Now you are looking for a place where you can improve your English, especially your spoken English.Here are some advertisements about English language training from newspapers. You may find the information you need.Global English CenterGeneral English in all four skills: listening, speaking, reading, and writing.*3-month(700yuan), 6-month (1,200yuan)and one-year(2,000 yuan)courses.*Choice of morning or evening classes, 3 hours per day, Mon.---Fri.*Experienced college English teachers.*Close to city center and bus stops.Tel:67605272 Add:105 Zhongshan Road, 100082.Modern Language SchoolSpecial courses in English for business. traveling, banking, hotel management and office skills.*Small classes (12-16 students)on Sat.& Sun. From 2:00-5:00pm.*Native English teachers from Canada and USA.*Language lab and computers supplied.*3-month course: 1,050yuan; 6-month course: 1,850yuan.Write or phone: Modern Language School, 675Park Road. 100056Tel:67353019The 21st Century English raining Center*We specialize in effective teaching at all levels.*We offer morning or afternoon classes, both of which last three months and a half at a cost of 800yuan.*We also have a six-week TOEFL preparation class during winter and summer holidays.*Entrance exams:June 1 and Dec.1.*Only 15-minute walk from city center.Call 67801642 for more information.The International House of English*Three/Six-month English courses for students of all levels at very low cost: 60yuan for 13 hours per week.*Convenient class hours:9:00-12:00am and 2:00-5:00pm.*A four-month evening program for developing speaking skills (same cost as day classes).*Free sightseeing and social activities.*Very close to Central Park.For further information call 67432308.75.You work from 9:00am to 4:30pm every day.Which schools will you choose?A. Global English Center and the International House of EnglishB. Global English Center and Modern Language SchoolC. Modern Language School and the 21st CenturyD. The 21st Century and the International House76.The 21st Century is different from the other three schools in that _________.A. its teaching quality is betterB. it requires an entrance examinationC. its courses are more advancedD. it is nearest to the city center77.You will probably prefer to go to the International House because it _________.A. offers free sightseeing and social activitiesB. costs less than the other schoolsC. has special course in spoken EnglishD. has native English teachers78.If you take the evening program at the International House, you will pay about _________.A. 60yuanB. 240yuanC. 720yuanD. 960yuan【答案】75.A 76.B 77.C 78.D【分析】75.第一个课程的时间为周一到周五的早上或晚上,第二个课程的时间为周六周日的下午2-5点,第三个课程的时间为早上或下午,第四个课程的时间为上午9-12点和下午2-5点以及晚上课程;上班时间为每天的9-4:30,要避开这段时间,故选A,第一个和第四个课程76.在第三个课程的第4点:Entrance exams:June 1 and Dec.1,故选B77.第四个课程的第4点:Free sightseeing and social activities,sightseeing和activities是free免费的,故A错;价格的基本差不多,故B错;第三个课程的第2点:Native English teachers from Canada and USA.,有native的是第三个课程,故D错;排除法,故选C78.第四个课程的第3点后面有(same cost as day classes),就是evening program价格跟白天一样,参照第四个课程第1点,60yuan for 13 hours per week,即一周60元,那么four-month是4个月=16周,60x16=960元,故选D(C)It’s 10 pm. You may not know where your child is, but the chip does.The chip will also know if your child has fallen and needs immediate help. Once doctors arrive, the chip will also be able to tell them which drugs are not suitable for little Johnny or Janie. At the hospital, the chip will tell doctors his or her complete medical history. And of course, when you arrive to pick up your child, settling the hospital bill with your health insurance policy will be a simple matter of waving your own chip-the one embedded in your hand.To some, this may sound unbelievable. But the technology for such chips is no longer the stuff of science fiction. And it may soon offer many other benefits besides locating lost children or elderly patients. It could be used as credit cards and people won’t have to carry wallets anymore.On the other hand, some are already wondering what this sort of technology may do to the sense of personal privacy and liberty.“Any technology of this kind could result in abuse of personal privacy,” says Lee Tien, seniorstaff attorney for the Electronic Frontier Foundation. “If a kid can be tracked, do you want otherpeople to be able to track your kid? It’s a double-edged sword.”Applied Digital Solutions, Inc. in Palm Beach, Florida, says it has recently applied to the Foodand Drug Administration for permission to begin testing its device in humans. About the size of agrain of rice, the microchip can be encoded (编码) with bits of information and embedded in humans under a layer of skin. When scanned by a nearby reader, the embedded chip gives the data.Most embedded chip designs are so-called passive chips, which give information only whenscanned by a nearby reader. But active chips-such as the proposed Digital Angel of the future-willgive out information all the time. And that means designers will have to develop some sort of power source that can provide a continuous source of energy, yet be small enough to be embedded with the chips.In addition to technical problems, many suspect that all sorts of legal and privacy issues would have to be cleared as well.79.By using the example in the first two paragraphs, the author wants to tell us that.A. chips are usually used to locate lost childrenB. chips are more convenient than credit cardsC. chips will soon be useful in many aspects of daily livesD. chips will bring out the issue of abuse of personal privacy80. What is the attitude of Lee Tien towards the chips?A. NegativeB. PositiveC. IndifferentD. Worried81. Which of the following statements about Digital Angel is NOT true?A.It will include a chip and a power source.B. It will be produced and replace active chips.C. It will be small enough to be embedded in humansD. It will give information without being scanned by a reader.82. It is indicated in the passage that chip producers have to consider the following issues EXCEPT______.A. financial problemsB. technical problemsC. legal problemsD. privacy problems【答案】79.C 80.D 81.B 82.A【分析】79.前两段讲的是芯片的用处多方面,故选C80.文章第5段中,他提出一些问题,说是一把双刃剑,故选D81.文章第6段第2句有写“the size of a grain of rice,....and embedded in humans under a layer of skin”,故C 正确;第7段第1句有写“which give information only when scanned by a nearby reader”,故D正确;A就是chip的定义和程序,故A正确;排除法,故选B82.文章倒数第2段提到需要科技来解决问题,最后一段有提到legal and privacy,故选A(D)Recently, a case of lifeboat ethics(伦理) occurred. On Aug. 4, Graham and Sheryl Anley, while boating off the coast of South Africa, hit a rock. As the boat threatened to sink the husband got off, but his wife was trapped in the boat. Instead of freeing his wife and getting her to shore, Graham grabbed Rosie, their pet dog. With Rosie safe and sound, Graham returned for Sheryl. All are doing fine.It's a great story, but it doesn't strike me as especially newsworthy. News is supposed to be about something fairly unique, and recent research suggests that, in the right circumstances, lots of people also would have grabbed their Rosie first.We have strange relationships with our pets. We lavish our pets with adoration and better health care than billions of people receive. We speak to pets with the same high-pitched voices that we use for babies. As an extreme example of our feelings about pets, the Nazis had strict laws that guaranteed the humane treatment of the pets of Jews being shipped to death camps.A recent paper by George Regents University demonstrates this human involvement with pets to an astonishing extent. Participants in the study were told a situation in which a bus is out of control, bearing down on a dog and a human. Which do you save? With responses from more than 500 people, the answer was that it depended: What kind of human and what kind of dog?Everyone would save a brother, grandparent or close friend rather than a strange dog. But when people considered their own dog versus people less connected with them—a distant cousin or a hometown stranger—votes in favor of saving the dog came rolling in. And an astonishing 40% of respondents, including 46% of women, voted to save their dog over a foreign tourist.What does a finding like this mean? First, that your odds aren't so good if you find yourself in another country with a bus bearing down on you and a cute dog. But it also points to something deeper: our unprecedented(史无前例的) attitude toward animals, which got its start with the birth of humane societies in the 19th century.We prison people who abuse animals, put ourselves in harm's way in boats between whales and whalers and show sympathy to Bambi and his mother. We can extend empathy to an animal and feel its pain like no other species. But let's not be too proud of ourselves. As this study and too much of our history show, we're pretty selective about how we extend our humaneness to other human beings.83:What is the function of the first paragraph?A.To create a relaxing mood for readers.B.To present the theme of this essay straightly.C.To lead in the main topic of this essay.D.To raise problems that will be solved later.84.The author mentions Nazi laws in the third paragraph _______________.A.to show how cruel the Nazis were to the JewsB.as an example to persuade people not to love petsC.to illustrate the strange relationship between human and petsD.as an example to display the humaneness of the Nazis85.Which of the following is true according to the article?A.The story of the Anleys and their dog was too unique to be newsworthy.B.Most people surveyed choose to save their own dog rather than a human.C.It was in the 19th century that human beings started to love their pets.D.Human beings are more and more concerned with animals nowadays.86.What does the author mainly argue for?A.Pets are of great significance to us human beings.B.We should rethink about our attitude towards animals and mankind.C.It is kind of human beings to extend humaneness to animals.D.We should be selective when showing attitude toward other human beings.【答案】83.C 84.C 85.D 86.B。

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七宝中学高一第一学期物理期末测试卷
(考试时间60分钟,满分80分)
命题:邓雪冰审核:李波
考生注意:计算器解答要求写出必要的文字说明、计算式和主要的演算步骤.只写出最后答案,未写出主要演算过程的,不能得分.本卷g取2
10m/s.
Ⅰ卷(共50分)
一、单项选择题(共8小题.每小题2分,共16分,每小题只有一个正确的选项)1.可以用来测量国际单位制规定的三个力学基本物理量的仪器是()
A.米尺、弹簧秤、秒表B.米尺、弹簧秤、光电门
C.量筒、天平、秒表D.米尺、天平、秒表
2.关于惯性的大小,下列叙述正确的是()
A.两个质量相同的物体,在阻力相同的情况下,速度大的不容易停下来,所以速度大的物体惯性大
B.两个质量相同的物体,不论速度大小,它们的惯性的大小一定相同
C.推动地面上静止的物体,要比维持这个物体做匀速运动所需的力大,所以物体静止时惯性大
D.在月球上举重比在地球上容易,所以质量相同的物体在月球上比地球上惯性小
3.关于两个大小不变的共点力与其合力的关系,下列说法正确的是()
A.合力大小随两力夹角增大而增大
B.合力的大小一定大于分力中最大者
C.两个分力夹角小于180 时,合力大小随夹角减小而增大
D.合力的大小不能小于分力中最小者
4.一个物体从离地某一高度作自由落体运动,已知它第1s内的位移为它最后1s内位移的一半,g取2
10m/s,则它开始下落时相距地面的高度为()
A.5m B.11.25m C.20m D.31.25m
5.如图所示,用水平力F把铁块压紧在竖直墙上不动,那么,当F增大时(设铁块对墙的压力为N,物体受墙的摩擦力为f)下列说法正确的是()
A.N增大,f不变
B.N增大,f增大
C.N变小,f不变
D .关于N 和f 的变化,以上说法都不对
6.某同学探究小球沿光滑斜面顶端下滑至底端的运动规律,现将量质量相同的小球同时从斜面的顶端释放,在甲、乙图的两种斜面中,通过一定的判断分析,你可以得到的正确结论是( )
A .甲图中小球在两个斜面上运动的时间相同
B .甲图中小球在两个斜面上运动的加速度相同
C .乙图中小球在两个斜面上运动的时间相同
D .乙图中小球在两个斜面上运动的加速度相同
7.三个相同的支座上分别搁着三个质量和直径都相等的光滑圆球a 、b 、c ,支点P 、Q 在同一水平面上,a 球的重心a O 位于球心,b 球和c 球的重心b O 、c O 分别位于球心的正上方和球心的正下方,如图所示,三球均处于平衡状态,支点P 对a 球的弹力为a N ,对b 球和c 球的弹力分别为b N 和c N ,则( )
A .a b c N N N ==
B .b a c N N N >>
C .b a c N N N <<
D .a b c N N N >=
8.如图所示,小车上固定着三角硬杆,杆的端点固定这一个质量为m 的小球.当小车有水平向右的加速度且逐渐增大时,杆对小球的作用力的变化(用1F 至4F 变化表示)可能是下图中的(OO '为沿杆反方向)( )
二、填空题(共3小题,每题4分,共12分)
9.一质点从地面做竖直上抛运动,在空中运动的时间为t,则抛出时的初速度为_________.上抛的最大高度为_________.
10.如图所示,固定在竖直平面内的光滑圆环的最高点有一个光滑的小孔,一小球套在圆环上.一根细线的下端系着小球,上端穿过小孔用手拉住,现拉动细线,使小球沿圆环缓慢上移.在移动过程中手对线的拉力F_________,圆环对小球的弹力N_________.(填“变大”、“变小”或“不变”)
11.图a表示用水平恒力F拉动水平上的物体,使其做匀速运动.当改变拉力的大小时,相对的匀加速运动的加速度a也会变化,a和F的关系如图b所示,则该物体的质量是_________kg,物体与水平面间的助摩擦因数是_________.(g取2
10m/s)
三、实验题(第12题4分,第13题6分,共10分)
12.(多选)做验证牛顿第三定律的DIS实验时,把两个力传感器的挂钩钩在一起,向相反方向拉动,观察软件界面上出现的结果见下图.观察分析两个力传感器的相互作用力随时间变化的曲线,可以看出()
A.作用力与反作用力一定是同一性质的力
B.作用力与反作用力一定大小相等
C.作用力与反作用力大小一定同时变化
D.牛顿第三定律仅在物体静止时适用
13.在“用DIS研究加速度与力的关系”的学生实验中,实验装置图如下图所示.
⑴本实验采用了_________传感器(填写传感器名称)
⑵(多选)两位同学通过实验数据画出a F
-图像(如图a、b所示).下列说法中正确的是()
A.出现图a的主要原因可能是轨道水平没调好而有滑轮的一端偏高
B.出现图a的主要原因可能是小车和轨道间的摩擦力较大
C.出现图b的主要原因可能是轨道水平没调好而没有滑轮的一端偏高
D.出现图b的主要原因可能是小车和轨道间的摩擦力较大
四、计算题(12分)
14.重为
18N
G=的砝码悬挂在绳PA和PB的结点P上.PA偏离竖直方向37︒角,PB沿水
平方向,且与重为
2100N
G=的木块相连接,木块静止于倾角为37︒的斜面上,如图所示,试求:(sin370.6
︒=,cos370.8
︒=)
⑴BP绳拉力大小;
⑵木块与斜面间的摩擦力大小;
⑶斜面对木块的弹力大小.
Ⅱ卷(共30分)
一、多项选择题(共4小题,每小题4分,共16分.每小题的四个选项中有两个或两个以上正确,把正确的选项填写在题后的括号内,漏选得2分,多选或错选均不得分)15.如右图,木箱内有一竖直放置的弹簧,弹簧上方有一物体;木箱静止时弹簧处于压缩状态且物块压在箱顶上.若在某一段时间内,物块对箱顶刚好无压力,则在此段时间内,木箱的运动状态可能为()
A.加速下降B.加速上升
C.减速上升D.减速下降
16.如图所示,汽车以10m/s的速度匀速驶向路口,当行驶至距路口停车线20m处时,绿灯还有3s熄灭.而该汽车在绿灯熄灭时刚好停在停车线处,则汽车运动的速度(v)—时间(t)图像可能是()
17.如图所示,两个完全相同的光滑球的质量为m,放在竖直挡板和倾角为α的固定斜面间.若缓慢转动挡板至斜面垂直,则在此过程中()
A.A、B两球间的弹力不变
B.B球对挡板的压力逐渐增大
C.B球对斜面的压力逐渐减小
D.A球对斜面的压力逐渐增大
18.质量为0.3kg的物体在水平面上运动,图中的两条直线分别表示物体受水平拉力和不受水平拉力的速度—时间图像,则下列说法中正确的是()
A.物体不受水平拉力时的速度图像一定是b
B.物体受水平拉力时的速度图像可能是a
C.物体的摩擦力可能等于0.2N
D.水平拉力一定等于0.1N
二、填空题(4分)
19.如图所示.质量1kg
m=的小物块受到平行斜面向上的拉力F,沿斜面做匀加速运动,
其初速度的大小为2m/s
v=
■,经2s
t=的时间物块在斜面上运动的位移10m
s=.已知斜面
倾角37θ=︒,物块与斜面之间的动摩擦因数0.1μ=.(sin370.6︒=,cos370.8︒=)则物块加速度的大小为_________2m /s ,拉力F 的大小为_________N .
三、计算题(10分)
20.质量为M 长为3L 的杆水平放置,杆两端A 、B 系着长为3L 的不可伸长且光滑的柔软轻绳,绳上套着一质量为m 的小铁环.已知重力加速度为g ,不计空气影响,
⑴现让杆与环均静止悬挂在空中,如图甲,求绳中拉力大小.
⑵若杆与环保持相对静止,在空中沿AB 方向水平向右做匀加速直线运动,此时环恰好悬于
A 端的正下方,如图乙所示.
①求此状态下杆的加速度大小a .
②为保持这种状态需在杆上施加一个多大的外力?。

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