配套K12河南省济源四中2018-2019学年高二物理暑假开学考试测试试题

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河南省济源四中2019届高三入学考试——物理(物理)

河南省济源四中2019届高三入学考试——物理(物理)

河南省济源四中2019届高三入学考试物理试题一、选择题(1-6为单选,7-9为多选,每题4分,漏选2分,错选不得分,共36分)1.一小石块从空中点自由落下,先后经过点和点,不计空气阻力。

经过点时速度为,经过点时速度为3,则段与段位移之比为( )A.1:3B.1:5C.1:8D.1:92.甲、乙两汽车在一平直公路上同向行驶.在到的时间内,它们的图象如图所示.在这段时间内( )A.汽车甲的平均速度比乙的大B.汽车乙的平均速度等于C.甲、乙两汽车的位移相同D.汽车甲的加速度大小逐渐减小,汽车乙的加速度大小逐渐增大3.取一根长2m左右的细线,5个铁垫圈和一个金属盘.在线的一端系上第一个垫圈,隔12cm再系一个,以后垫圈之间的距离分别为36cm、60cm、84cm,如图所示.站在椅子上,向上提起线的另一端,让线自由垂下,且第一个垫圈紧靠放在地面上的金属盘内.松手后开始计时,若不计空气阻力,则第2、3、4、5各垫圈( )A.落到盘上的声音时间间隔越来越大B.落到盘上的声音时间间隔相等C.依次落到盘上的速率关系为1:1::2D.依次落到盘上的时间关系为)(4.质量为的木块在光滑的水平面上以速度向右运动,质量为的子弹以速度向左射入木块并停留在木块中,要使木块停下来,发射子弹的数目是( )A. B. C. D.5.—个静止的放射性同位素的原子核衰变为 ,另一个静止的天然放射性元素的原子核衰变为 ,在同一磁场中,得到衰变后粒子的运动径迹1、2、3、4,如下图所示则这四条径迹依次是( )A.电子、、、正电子B. 、电子、正电子、、C. 、正电子、电子、D.正电子、、、电子6.氢原子从能级跃迁到能级时辐射红光的频率为,从能级跃迁到能级时吸收紫光的频率为,已知普朗克常量为,若氢原子从能级跃迁到能级,则( )A.吸收光子的能量为B.辐射光子的能量为C.吸收光子的能量为D.辐射光子的能量为7.如图所示,在水平面上固定着三个完全相同的木块,一子弹以水平速度射入木块,若子弹在木块中做匀减速直线运动,当穿透第三个木块时速度恰好为零,则子弹依次射入每个木块时的速度比和穿过每个木块所用的时间比分别为( )A.B.C.D.)123:::1:1t t t = 8.一含有光电管的电路如图甲所示,乙图是用a 、b 、c 光照射光电管得到的I -U 图线,U c1、U c2表示截止电压,下列说法正确的是( )A.甲图中光电管得到的电压为正向电压B.a 、b 光的波长相等C.a 、c 光的波长相等D.a 、c 光的光强相等9.在光滑水平面上,有A 、B 两个小球沿同一直线向右运动,已知碰前两球的动量分别为,,碰撞后它们动量的变化是与有可能是( )A.B.C.D.二、实验题(每空3分,15分)10.研究小车匀变速直线运动的实验装置如图()所示,其中斜面倾角可调。

河南省济源四中2024年高二物理第一学期期末综合测试试题含解析

河南省济源四中2024年高二物理第一学期期末综合测试试题含解析
A.质子被加速后的最大速度不能超过2πRf
B.加速的质子获得的最大动能随加速电场U增大而增大
C.质子第二次和第一次经过D型盒间狭缝后轨道半径之比为
D.不改变磁感应强度B和交流电的频率f,该加速器也可加速粒子
9、如图所示,在绝缘的斜面上方,存在着匀强电场,电场方向平行于斜面向上,斜面上的带电金属块在平行于斜面的力F作用下沿斜面移动.已知金属块在移动的过程中,力F做功32J,金属块克服电场力做功8J,金属块克服摩擦力做功16J,重力势能增加18J,则在此过程中金属块的()
7、AC
【解题分析】A项:由图可知当转换开关S旋到位置1、2位置是电流表,接1时分流电阻相对更小,故接1时电表的量程更大;故A正确;
B、C项:测量电阻时欧姆表内部应接电源,由图可知测电阻只有接3或4;A与电源的负极相连,故A为红表笔;故B错误,C正确;
D项:要测量电压,电流表应与电阻串联,由图可知当转换开关S旋到位置5、6时;测量电压,电流表所串联的电阻越大,所测量电压值越大,故当转换开关S旋到6的量程比旋到5的量程大,故D错误
河南省济源四中2024年高二物理第一学期期末综合测试试题
注意事项
1.考生要认真填写考场号和座位序号。
2.试题所有答案必须填涂或书写在答题卡上,在试卷上作答无效。第一部分必须用2B 铅笔作答;第二部分必须用黑色字迹的签字笔作答。
3.考试结束后,考生须将试卷和答题卡放在桌面上,待监考员收回。
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)试说明导体棒ab中电流的方向;
(2)当磁感应强度 多少时,导体棒恰好不上滑?
12.(12分)如图是一个多用表欧姆档内部电路示意图.电流表满偏电流0.5mA、内阻10Ω;电池电动势1.5V、内阻1Ω;变阻器 阻值0-5000Ω

河南省济源四中2018_2019学年高二英语上学期第一次质量检查试题

河南省济源四中2018_2019学年高二英语上学期第一次质量检查试题

济源四中2018-2019学年上学期第一次质量检测高二英语试题(时间:100分钟分值:150分)第Ⅰ卷(共100分)第一部分听力(共两节,满分30分)第二部分阅读理解(共两节,满分40分)第一节(共15小题,每小题2分,满分30分)阅读下面短文,从每题所给的四个选项(A、B、C和D)中,选出最佳选项。

AA Healthy Habits Survey(调查)shows that only about one third of American seniorshave correct habits. Here are some findings and expert advice.1. How many times did you brush your teeth yesterday?· Finding:A full 33% of seniors brush their teeth only once a day.· Step:Remove the 300 types of bacteria(细菌) in your mouth each morning witha battery-operated toothbrush. Brush gently for 2 minutes, at least twice aday.2. How many times did you wash your hands or bathe yesterday?· Finding:Seniors, on average, bathe fewer than 3 days a week. And nearly 30% wash their hands only 4 times a day—half of the number doctors recommend. · Step:We touch our faces around 3,000 times a day—often inviting germs(病菌)to enter our mouths, noses, and eyes. Use toilet paper to avoid touching the door handle. And, most important, wash your hands often with hot running water and soap for 20 seconds.3. How often do you think about fighting germs?· Finding:Seniors are not fighting germs as well as they should.· Step:Be aware of germs. Do you know it is not your toilet but your kitchen sponge (海绵)that can carry more germs than anything else? To kill these germs, keep your sponge in the microwave for 10 seconds.21. What is found out about American seniors?A. Most of them have good habits.B. About one third of them brush their teeth only once a day.C. All of them are fighting germs better than expected.D. Nearly 30% of them bathe three days a week.22. Doctors suggest that people should wash their hands .A. eight times a dayB. three times a dayC. four times a dayD. twice a day23. Which of the following is true according to the text?A. We should keep from touching our faces.B. There are less than 300 types of bacteria in the mouth.C. We should wash our hands before touching a door handle.D. A kitchen sponge can carry more germs than a toilet.24. The text probably comes from .A. a guide bookB. an official documentC. a book reviewD. a popular magazineBWe met in a crowded showroom fifteen years ago. As I inched forward I eyed him with suspicion, unsure what to make of this stranger. A salesman made the proper introduction and although we got to know each other, I didn’t trust him. I call him Super. I would find myself staring at him, wondering what secrets he held.I found myself spending more and more time with Super, getting to know him, learning to trust him. My other friends soon became a little jealous, stating that I spent too much time with him. It was true, but I didn’t feel guilty, for I could just be myself with him. He didn’t care about my appearance, pay and failure. None of these things mattered to him.Then one day he said he was going to show me the world. He said that I could ask to go anywhere, anywhere at all. When I asked him to show me New York, he didn’t hesitate. He showed me the bright lights of Broadway, the majestic Statue of Liberty and so much more.Late at night we played games. Sometimes I won, sometimes he did. It didn’t matter because we had fun. Through him I met other people.Then suddenly he became sick. He was unable to do anything and I felt so helpless because I didn’t know what was wrong. But I knew those who could. I paced around the room while he was examined. What if it was something serious? What if he died?I cried but luckily he was fine again.I looked at him and saw my companion, such as my teacher, instructor, travel guide and so on. He was my friend, my best friend. He is …my computer.25. The author didn’t believe Super even if he knew him better as he thoug ht ________.A. the salesman was always cheating customers these daysB. Super had limited power since he was only a machineC. he would forget the salesman’s instructions in futureD. his money spent on him wasn’t good for the value26. Why did the author’s other friends envy Super?A. As Super helps the author do his housework.B. As the author spent so much money on it.C. As the author spent so much time on it.D. As the author trusted nobody but Super.27. The underlined sentence most probably implies __________.A. the connection of the Internet broadened the author’s sightB. Super was a good guide since he was bought from AmericaC. Super invited the author to make a trip around the worldD. Super had the power to speak out like an ordinary person28. Why did the author feel helpless when his best friend got sick?A. He thought Super had no chance to recover at all.B. He didn’t know who could save Super at that time.C. He didn’t know how to deal with Super’s sickness.D. He was worried that he would have to change a new friend.CChristmas is a wonderful time for celebration and sharing Christmas traditions around the world. No matter where you and your family spend Christmas, it is sure to be a time for laughter and cheers.It is both interesting and exciting to learn about other Christmas traditions around the world. Christmas around the world for many people is a time full of stories, traditions and beliefs, nowhere is there more true than that in the country of Poland where superstition and legend (迷信和传说) takes preference.Christmas Eve in Poland is a time for family gathering and reunion, and it is also considered to be a night of magic. It was believed long ago that animals talked and had the power to tell the future. The traditional Polish Christmas Eve dinner is a grand feast including twelve different dishes representing the twelve months of the year.Usually the meal will not include any meat except for fish. Some of the favorite dishes include wild mushrooms or peas, dried fruit compote (蜜饯) for dessert, and dumplings with a variety of fillings. When dinner is finished, the host will give a signal for everyone to rise as it is bad luck for only one person to rise at a time.Christmas in Poland would not be complete without the storytelling and Christmas songs sung around the Christmas tree. In Poland after the traditional Christmas Eve dinner, the remainder of the night are reserved for exactly that storytelling and singing while sitting around the beautifully decorated tree with its blown glass decorations, eggshells, colored paper and straw.29. What does the underlined sentence mean?A. People in Poland don’t believe the strange stories.B. There are fewest stories about Christmas in Poland.C. Poland has the most superstition and legend about Christmas.D. People in Poland like collecting stories most.30. Why do people in Poland think Christmas Eve a night of magic?A. All the people in the big family will get together at Christmas.B. It was said that animals had the unusual power to predict the future.C. There will be some excellent TV programs on Christmas Eve.D. The pets at home will really talk to the owner at Christmas.31. Why are there twelve dishes for Polish Christmas Eve dinner?A. The dishes will be matched with twelve fruits.B. There will be twelve people getting together.C. They stand for the twelve months of a year.D. They stand for the twelve hours of a day.DI had to go for my yearly X-ray examination today… I’m alw ays a bit anxious about this since my grandmother died of breast cancer and my mom has had it too although she’s fine.I went last year for the first time and it was a very unpleasant experience, not helped by the technician who attended to me, so I was pretty much dreading it today.To my great relief and joy, the woman technician who worked with me today was an absolute ANGEL… her kindness and excellence at her job just made such a difference in my experience.She was so professional and polite. When she finished, I told her “You are so good at your job; I just want to thank you for making this so easy for me.” She smiled at me and I suddenly broke down crying telling her about my family and my previous horrible experience. She listened and then gave me a big hug. She hugged again until I felt better. Her care was so heartfelt and true and she made my experience so much more positive.She gave me a card so I could ask for her next time (you bet I will!). She said “We sometimes just do this routinely, tr ying to get in so many patients; we sometimes forget that everyone has a story.” I am so grateful to her for not only doing her job well, but for taking the time to hear my story. You know that I will be writing a letter of gratitude to her boss telling him how lucky he is to have such a wonderful woman working there. And to anyone who works in any part of the health care system—please know that everyone who comes in has a story and your smile and attitude can make a big difference to them.32. Why does the author go for X-ray examination every year?A. The government orders all women to do so in the country.B. Her grandmother’s cancer and mother’s cancer make her frightened.C. Her knowing of the common sense of breast cancer.D. Her habit of having a medical examination from childhood.33. Why did the author think of the woman an absolute ANGEL?A. She hugged her even if the author was a patient.B. She looks more beautiful than any other doctor.C. She was expert at her job and she was kind and polite.D. She would like to listen to her story after the examination.34. Why did the author decide to write a letter to the woman’s boss?A. To tell the boss the secret of the woman doctor.B. To ask the boss to give the woman a pay rise.C. To advise the boss to buy more advanced equipment.D. To tell the boss that has luck having such an excellent employee.35. What can give others more help at the healthy care centre?A. Some medicine.B. More experts.C. More smile.D. Well-equipped instruments.第二节(共5小题;每小题2分,满分10分)根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。

河南省济源四中2018-2019学年高二上学期第一次质量检查物理试卷 Word版含答案

河南省济源四中2018-2019学年高二上学期第一次质量检查物理试卷 Word版含答案

济源四中2018—2019学年上学期第一次质量检测高二物理试题(时间:90分钟分值:100分)命题人:李鹏做题人:杜岩金第I卷(选择题,共56分)一、选择题(每题4分,共56分。

1-10单选,11-14多选。

选不全得2分,不选、多选、选错均为0分)1、真空中两个点电荷,它们之间的静电力为F,如果将两个点电荷的距离增大为原来的2倍,电量都增大为原来的2倍。

它们之间静电力的大小为()A.F/2 B.F C.2F D.4F2、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E=F/q②场强E=U/d③场强E=kQ/r2④电场力做功W=UqA.①③B.②③ C.②④D.①④3、如图所示,三个完全相同的金属小球、、位于等边三角形的三个顶点上.和带正电,带负电,所带电量的大小比的小.已知受到和的静电力的合力可用图中四条有向线段中的一条来表示,它应是( )A. B. C. D.4、A、B是一条电场线上的两个点,一带正电的粒子仅在电场力作用下以一定的初速度从A点沿电场线运动到B点,其v-t图象如图甲所示.则这电场的电场线分布可能是下图中的( )5、如图所示,直线上有、、、四点,、间的距离与、间的距离相等.在点处有固定点电荷.已知点电势高于点电势.若一带负电荷的粒子仅在电场力作用下先从点运动到点,再从点运动到点,则( )A.两过程中电场力做的功相等B.前一过程中电场力做的功大于后一过程中电场力做的功C.前一过程中,粒子电势能不断减小D.后一过程中,粒子动能不断减小6、在匀强电场中将一带电量为q,质量为m的小球由静上释放,带电小球运动轨迹为一直线,该直线与竖直方向的夹角为θ,如上图所示,则匀强电场强最小值为:( )A. mg/qB. mgsinθ/qC. mgcosθ/qD. mgtgθ/q7、如图所示,1、2、3为匀强电场中的三个竖直等势面且U12=U23。

一带电粒子从a点进入,其轨迹与等势面交点依次为a、b、c,若不计重力影响,则:()A.粒子运动过程中,电场力做正功,电势能减小B.若带电粒子带负电,则受到的电场力方向竖直向下C.若带电粒子带正电,则电场强度方向一定水平向左D.1、2、3三个等势面的电势的关系是φ2=φ1+φ38、如图所示,场强为E的水平方向匀强电场中,有一质量为m、电量为+q的微粒,在外力作用下,从A点竖直向上移至B点,且速度不变,若AB长为h,则这一过程中外力的大小和外力做的功为()9、如图所示,将平行板电容器接在电源两极间,电容器两极板间的带电尘埃恰好处于静止状态.若将两极板缓慢地错开一些,其他条件不变,则( )A.电容器带电荷量不变B.电源中将有电流从正极流出C.尘埃仍静止D.电流计中将有电流通过,电流方向由10、如图所示,电子从负极板边缘垂直射入匀强电场,恰好从正极板边缘飞出.现在若使两极板间的距离增大为原来二的2倍,两极板间的电压保持不变,电子入射的方向和位置不变,且电子仍恰从正极板边缘飞出,则电子入射速度大小应为原来的( )A.倍B.倍C.倍D.2倍11、如图所示,三条平行等距的虚线表示电场中的三个等势面,电势值分别为10 V、20V、30V,实线是一带负电的粒子(不计重力)在该区域内的运动轨迹,对于轨迹上的a、b、c三点来说()A.粒子在三点的合力Fa=Fb=FcB.粒子必先过a,再到b,然后到cC.粒子在三点的动能大小为E Kb>E Ka>E KcD.粒子在三点的电势能大小为E Pc<E Pa<E Pb12、如图所示,平行板电容器的两个极板为A、B,B极板接地,A极板带有电荷量+Q,板间电场有一固定点P,若将B极板固定,A极板下移一些,或者将A极板固定,B极板上移一些,在这两种情况下,以下说法正确的是( )A.A极板下移时,P点的电场强度不变,P点电势不变B.A极板下移时,P点的电场强度不变,P点电势升高C.B极板上移时,P点的电场强度不变,P点电势降低D.B极板上移时,P点的电场强度减小,P点电势降低13、如图所示,平行直线表示电场线,但未标方向,带电为+10-2C的微粒在电场中只受电场力作用,由A点移到B点,动能损失0.1J,若A点电势为-10V,则()A.B点的电势为10VB.电场线方向从右向左C.微粒的运动轨迹可能是轨迹1D.微粒的运动轨迹可能是轨迹214、一质量为m的带电液滴以竖直向下的初速度V0进入某电场中.由于电场力和重力的作用,液滴沿竖直方向下落一段距离h后,速度为零。

2019届河南省济源四中高三入学考试物理试卷(解析版)

2019届河南省济源四中高三入学考试物理试卷(解析版)

济源四中新高三入学考试试卷高三物理一、选择题(1-6为单选,7-9为多选,每题4分,漏选2分,错选不得分,共36分)1.一小石块从空中a点自由落下,先后经过b点和c点,不计空气阻力.经过b点时速度为v,经过c点时速度为3v,则ab段与ac段位移之比为( )A. 1∶3B. 1∶5C. 1∶8D. 1∶9【答案】D【解析】试题分析:本题中没有涉及时间,涉及的物理量有位移和速度,故选择位移速度公式分析解题。

根据公式,可得,,联立解得,故C正确。

2.甲乙两汽车在一平直公路上同向行驶。

在t=0到t=t1的时间内,它们的v-t图像如图所示。

在这段时间内( )A. 汽车甲的平均速度比乙大B. 汽车乙的平均速度等于C. 甲乙两汽车的位移相同D. 汽车甲的加速度大小逐渐减小,汽车乙的加速度大小逐渐增大【答案】A【解析】如图添加的虚线是匀变速运动时的图像A、C项,由图可知,时间内,甲车的位移大于乙车,所以根据平均速度定义,可知汽车甲的平均速度比乙的大,故A项正确,C项错误。

B项,当汽车乙做匀变速直线运动的时候,平均速度等于,而根据图,乙车图的面积小于三角形面积,因此汽车乙的平均速度小于,故B项错误。

D项,由图的斜率表示汽车的加速度大小,可知汽车甲和汽车乙的加速度均逐渐减小,故D项错误。

综上所述,本题正确答案为A。

3.取一根长2m左右的细线,5个铁垫圈和一个金属盘.在线的一端系上第一个垫圈,隔12cm再系一个,以后垫圈之间的距离分别为36cm、60cm、84cm,如图所示.站在椅子上,向上提起线的另一端,让线自由垂下,且第一个垫圈紧靠放在地面上的金属盘内.松手后开始计时,若不计空气阻力,则第2、3、4、5各垫圈( )A. 落到盘上的声音时间间隔越来越大B. 落到盘上的声音时间间隔相等C. 依次落到盘上的速率关系为D. 依次落到盘上的时间关系为【答案】B【解析】【详解】5个铁垫圈同时做自由落体运动,下降的位移之比为1:3:5:7.可以看成一个铁垫圈自由下落,经过位移之比为1:3:5:7.因为初速度为零的匀加速直线运动在相等时间内的位移之比为1:3:5:7,知各垫圈落到盘中的时间间隔相等,故B正确,A错误;因为各垫圈落到盘中的时间间隔相等,则各垫圈依次落到盘中的时间比为1:2:3:4.根据v=gt知,依次落到盘中的速率关系为1:2:3:4,故CD错误。

河南省2018-2019学年高二高中学业水平测试物理试题(带答案解析)

河南省2018-2019学年高二高中学业水平测试物理试题(带答案解析)

河南省2018-2019学年高二高中学业水平测试物理试题第I卷(选择题)一、单选题1.下列物理量属于标量的是()A.速度B.位移 C.时间D.力2.在下列研究中,可以把物体看成质点的是()A.分析乒乓球的旋转B.研究地球自转时的地球C.研究车轮旋转情况时的车轮D.研究某同学从家到学校的速度3.某场班级足球赛在16时20分正式开始,甲班经过30分钟的顽强拼搏,终于攻入了一球.下列说法正确的是()A.“16时20分”和“30分钟”均指时刻B.“16时20分”和“30分钟”均指时间间隔C.“16时20分”是指时间间隔,“30分钟”是指时刻D.“16时20分”是指时刻,“30分钟”是指时间间隔4.下列速度中,指平均速度的是()A.雨滴落地时的速度B.汽车通过北京长安街的速度C.子弹射出枪口时的速度D.跳水运动员起跳后,到达最高点的速度5.火车停靠在站台上,乘客往往会发现这样的现象,对面的火车缓缓起动了,等到站台出现,才知道对面的火车没有动,而是自己乘坐的火车开动了,则前、后两次乘客采用的参考系是:A.站台,对面火车B.两次都是对面火车C.两次都是对面站台D.自己乘坐的火车,站台6.不计空气的作用,小球沿固定光滑斜面下滑的过程中受到的作用力共有()A.一个B.两个C.三个D.四个7.甲、乙两车在同一地点同时做直线运动,其v-t图象如图所示,则()A.它们的初速度均为零B.甲的加速度大于乙的加速度C.0~t1时间内,甲的速度大于乙的速度D.0~t1时间内,甲的位移大于乙的位移8.在某同学用手向上提起一桶水的过程中, 下列说法正确的是A.手对桶先有作用力,然后桶对手才有反作用力B.手对桶的作用力与桶对手的反作用力方向相同C.手对桶的作用力大于桶对手的反作用力D.手对桶的作用力与桶对手的反作用力大小相等9.如图所示,用劲度系数为1000N/m的轻质弹簧竖直悬挂一重物,重物静止时,弹簧的伸长量为2cm,则弹簧对重物的拉力A.大小为2000N,方向竖直向上B.大小为2000N,方向竖直向下C.大小为20N,方向竖直向上D.大小为20N, 方向竖直向下10.牛顿第二定律的表达式可以写成m=F/a,对某个物体来说,它的质量m ()A.跟合外力F成正比 B.跟它的加速度a成反比C.跟合外力F与加速度a都无关 D.跟合外力F成反比,跟它的加速度a成正比11.关于曲线运动,下列说法中正确的是()A.做曲线运动的物体一定具有加速度 B.做曲线运动的物体的速度可能不变C.做曲线运动的物体受力一定发生变化 D.在恒力作用下的物体不可能做曲线运动12.从同一点0分别将a、b两小球沿同一水平方向抛出,两小球落在同一水平地面上,忽略空气阻力,它们的运动轨迹如图所示,,用t a、 t b分别表示a、b,两小球在空中的运动时间, 则A.t a=t b B.t a>t bC.t a<t b D.t a与t b的大小关系无法确定13.如图所示,左、右两斜面的底端平滑连接.让小球从左边斜面上高度为h 处由静止开始向下运动,根据伽利略的猜想,如果不计摩擦阻力及空气阻力,小球在右边斜面上上升的最大高度将()A.大于h B.小于h C.等于h D.无法确定14.关于第一宇宙速度,下列说法正确的是()A.它是人造地球卫星绕地球飞行的最小速度B.它是使卫星进入近地圆轨道的最大发射速度C.它是近地圆轨道上人造地球卫星的运行速度D.它是卫星在椭圆轨道上运行时在远地点的速度15.国产大飞机C919于去年5月5日首飞成功,标志着我国大型客机项目取得重大突破。

2019届河南省济源四中高三上学期期中考试物理试卷Word版

2019届河南省济源四中高三上学期期中考试物理试卷Word版

济源四中2018—2019学年高三上学期期中考试物理 试题(时间:90分钟 分值:100分)第I 卷(选择题,共60分)一、选择题(本题共12小题,每小题5分,共60分。

第1~8题单选,第9~12题多选。

全部选对的得5分,少选的得3分,错选或不选的得0分) 1.曹冲秤象故事讲的是曹冲把象牵到船上,等船身稳定了,在船舷上齐水面的地方刻了一条线.把象牵到岸上来后再把一块一块的石头装上船,等船身沉到刚才刻的那条线和水面平齐后,石头总的重量等于大象的重量,下列物理学习或研究中用到的方法与曹冲秤象的方法相同的是( ) A .研究“加速度与合外力、质量”的关系 B .建立“质点”的概念C .建立“合力和分力”的概念D .建立“瞬时速度”的概念2.一质点由静止开始按如图所示的规律运动,下列说法正确的是( )A .质点在2t 0的时间内始终沿正方向运动,且在2t 0时距离出发点最远B .质点做往复运动,且在2t 0时回到出发点C .质点在20t 时的速度最大,且最大的速度为400ta D .质点在2t 0时的速度最大,且最大的速度为00t a3.如图甲所示,某工地上起重机将重为G 的正方形工件缓缓吊起,四根质量不计等长的钢绳,一端分别固定在正方形工件的四个角上,另一端汇聚于一处挂在挂钩上,绳端汇聚处到每个角的距离均与正方形工件的对角线长度相等,如图乙所示。

则每根钢绳的受力大小为( )A .14GB .2GC.12G D.3G4.如图所示,质量为M的斜面体A放在粗糙水平面上,用轻绳拴住质量为m的小球B置于斜面上,整个系统处于静止状态,已知斜面倾角及轻绳与竖直方向夹角均为θ=30°。

不计小球与斜面间的摩擦,则()A.轻绳对小球的作用力大小为3mgB.斜面对小球的作用力大小为2mgC.斜面体对水平面的压力大小为(M+m)gD.斜面体与水平面间的摩擦力大小为3mg5.如图所示,用轻绳AO、BO系住一物体使其处于平衡状态,绳AO与竖直方向成一角度,绳BO水平.当绳子的悬点A缓慢向右移动时,BO始终保持水平,在AO到达竖直方向前,关于绳子AO和BO的拉力,下列说法中正确的是()A.绳AO的拉力先增大后减小 B.绳AO的拉力先减小后增大C.绳BO的拉力先增大后减小 D.绳BO的拉力一直在减小6.如图所示,两个完全相同的小球A、B,在同一高度处,以相同大小的初速度v分别水平抛出和竖直向上抛出。

河南省济源四中2018-2019学年高二物理暑假开学考试测试试题

河南省济源四中2018-2019学年高二物理暑假开学考试测试试题

济源四中2017级高二开学考试物理试题一、单选题(每题5分,共60分。

多选题选不全得3分,选错得0分。

)1.人类认识行星运动规律的曲折过程给我们的启示:从地心说的直接经验开始,到日心说的转变,不是简单的参考系的变化,而是人类思想的一次重大解放,从此人类的视野超越了地球,走向了宇宙。

关于科学家和他们的贡献,下列说法中与物理学的发展历史不相符合的是( ) A.腊科学家托勒密提出了地心说:认为地球是静止不动的,太阳、月亮和星星从人类头顶飞过,地球是宇宙的中心B.波兰天文学家哥白尼,发表著作《天体运行论》提出日心说,预示了地心宇宙论的终结C.德国天文学家开普勒对他的导师——第谷观测的行星数据进行了多年研究,得出了开普勒三大行星运动定律D.波兰天文学家哥白尼,提出了日心说,为此被宗教裁判所烧死在罗马的鲜花广场,为科学付出了生命的代价2.关于曲线运动,下列说法中正确的是( ) A.曲线运动物体的速度方向保持不变 B.曲线运动一定是变速运动C.物体受到变力作用时就做曲线运动D.曲线运动的物体受到的合外力可以为零3.在离地面离度为h ,离竖直光滑垴的水平距离为s 处,将一小球以的速度向墙水平抛出,如图所示,小球与墙碰撞后落地,不计碰撞时的时间和能量损失(碰撞前后竖直分速度保持不变,水平分速度大小相等,方向相反)。

小球落地点到墙的水平距离处,则撞击点离地面的竖直高度为( )A. 12hB. 13hC. 716hD. 916h4.如图所示,物体A 、B 通过细绳及轻质弹簧连接在轻滑轮两侧,物体A 、B 的质量都为m ,开始时细绳伸直,用手托着物体A ,使弹簧处于原长,此时A 距地面的高度为h ,物体B 静止在地面上.放手后物体A 下落,与地面即将接触时速度大小为v ,此时物体B 对地面恰好无压力,则下列说法中正确的是( )A.弹簧的劲度系数为mghB.此时弹簧的弹性势能等于212mgh mv C.此时物体B 的速度大小也为vD.此时物体A 的加速度大小为g ,方向竖直向上5.一个排球在A 点被竖直向上抛出时动能为30J ,上升到最大高度后,又回到A 点,动能变为12J ,设排球在运动过程中受到的空气阻力大小恒定,则( )A.从最高点回到A 点过程克服阻力做功18JB.上升到最高点过程机械能减少了18JC.从最高点回到A 点过程重力势能减少了12JD.上升到最高点过程重力势能增加了21J6.我国自主研制的“嫦娥三号”,携带“玉兔”月球车已于2013年12月2日1时30分在西昌卫星发射中心发射升空,落月点有一个富有诗意的名字“广寒宫”。

济源市第四中学2018-2019学年高二上学期第一次月考试卷物理

济源市第四中学2018-2019学年高二上学期第一次月考试卷物理

济源市第四中学2018-2019学年高二上学期第一次月考试卷物理班级__________ 座号_____ 姓名__________ 分数__________一、选择题1.如图所示为直升飞机由地面垂直起飞过程的速度时间图象,则关于飞机的运动,下面说法正确的是()A. 0~5s内飞机做匀加速直线运动B. 5~15s内飞机在空中处于悬停状态C. 15~20s内飞机匀减速下降D. 0~25s内飞机上升的最大高度为300m2.(2016·辽宁五校联考)中国志愿者王跃参与人类历史上第一次全过程模拟从地球往返火星的试验“火星-500”。

假设将来人类一艘飞船从火星返回地球时,经历如图所示的变轨过程,则下列说法正确的是()A.飞船在轨道Ⅱ上运动时,在P点的速度大于在Q点的速度B.飞船在轨道Ⅰ上运动时,在P点的速度大于在轨道Ⅱ上运动时在P点的速度C.飞船在轨道Ⅰ上运动到P点时的加速度等于飞船在轨道Ⅱ上运动到P点时的加速度D.若轨道Ⅰ贴近火星表面,测出飞船在轨道Ⅰ上运动的周期,就可以推知火星的密度3.一正弦交流电的电流随时间变化的规律如图所示.由图可知A.该交流电的频率是50HzB.该交流电的电流有效值为C .该交流电的电流瞬时值的表达式为i=2sin (50πt )(A )D .若该交流电流通过R=10Ω的电阻,则电阻消耗的功率是20W4. 高跷运动是一项新型运动,图甲为弹簧高跷。

当人抓住扶手用力蹬踏板压缩弹簧后。

人就向上弹起,进而带动高跷跳跃,如图乙。

则下列说法正确的是A .人向上弹起过程中,先处于超重状态,后处于失重状态B .人向上弹起过程中,踏板对人的作用力大于人对踏板的作用力C .弹簧压缩到最低点时,高跷对人的作用力大于人的重力D .弹簧压缩到最低点时,高跷对地的压力等于人和高跷的总重力5. 小型登月器连接在航天站上,一起绕月球做圆周运动,其轨道半径为月球半径的3倍,某时刻,航天站使登月器减速分离,登月器沿如图所示的椭圆轨道登月,在月球表面逗留一段时间完成科考工作后,经快速启动仍沿原椭圆轨道返回,当第一次回到分离点时恰与航天站对接,登月器快速启动时间可以忽略不计,整个过程中航天站保持原轨道绕月运行。

河南省济源四中2018-2019学年高二英语暑假开学考试测试试题

河南省济源四中2018-2019学年高二英语暑假开学考试测试试题

济源四中2017级高二开学考试英语试题(时间:100分钟分值:150分)第一部分:阅读理解(共两节,满分40分)第一节:(共15小题;每小题2分,满分30分)AEditor: Today our topic is part-time job. Are they good for school children or not? Headmaster: Certainly not. Children have got two full-time jobs already: growing up and going to school. Part-time jobs make them so tired that they fall asleep in class. Mrs. White:I agree. I know school hours are short, but there’s homework as well, and children need a lot of sleep.Mr. White:Young children, perhaps some boys, s tay at school until they’re eighteen or nineteen. A part-time job can’t harm them. In fact, it’s good for them. They earn their pocket money instead of asking their parents for it. And they see something of the world outside school.Businessman:You’re qu ite right. Boys learn a lot from a part-time job. And we mustn’t forget that some families need the extra money. If the pupils didn’t take part-time jobs, they couldn’t stay at school.Editor: Well, we have got two for, and two against. What do our readers think?21. Who have the same opinion?A. Headmaster and Mrs. White.B. Editor and Mr. White.C. Mr. and Mrs. White.D. Businessman and Headmaster.22. Mrs. White thinks the young children maybe ________.A. need to stay at school until they are eighteen or nineteenB. need to have some pocket moneyC. should see something of the world outside schoolD. need to have a lot of sleep23. What does the editor think of part-time jobs?A. They can help students from poor families.B. They are good for school children.C. They cannot harm school children.D. We are not told.BCold weather can be hard on pets, just like it can be hard on people. Sometimes owners forget that their cats are just as used to the warm shelter (住所) as they are. Some owners will leave their animals outside for a long period of time, thinking that all animals are used to living outdoors. This can put their pets in danger of serious illness. There are things you can do to keep your animal warm and safe.Keep your pets inside as much as you can when the weather is bad. If you have to take them out, stay outside with them. When you’re cold enough to go inside, they probably are too. If you must leave them outside for a long time, make sure they have a warm, solid shelter against the wind, thick bedding, and plenty of non-frozen water.If left alone outside, dogs and cats can be very smart in their search for warm shelter. They can dig into snow banks or hide somewhere. Watch them closely when they are left outdoors, and provide them with shelter of good quality. Keep an eye on your pet’s water. Sometimes owners don’t realize that a water bowl has frozen and their pet can’t get anything todrink. Animals that don’t have clean and unfrozen water may drink dirty water outside, which may contain something unhealthy for them.24. What do we learn about pets from Paragraph 1? ________.A. They are often forgotten by their ownersB. They like to stay in warm placesC. They build their own sheltersD. They are used to living outdoors25. Why are pet owners asked to stay with their pets when they are out in coldweather?_______.A. To help them find sheltersB. To keep them companyC. To know when to bring them insideD. To keep them from eating bad food26. If pets are left on their own outdoors in cold weather, they may ________.A. get lost in the wildB. run short of clean waterC. dig deep holes for funD. make the water in the bowl dirty27. What is the purpose of this text? ________.A. To give practical adviceB. To solve an argumentC. To tell an interesting storyD. To present a research resultCGetting rid of dirt(灰尘;尘土;污物), in the opinion of most people, is a good thing. However, there is nothing fixed about attitudes to dirt.In the early 16th century, people thought that dirt on the skin was a way to block out disease, as medical opinion had it that washing off dirt with hot water could open up the skin and let illnesses in. A particular danger was thought to lie in public baths. By 1538, the French king had closed the bath houses in his kingdom. So did the king of England in 1546. Thus it began a long time when the rich and the poor in Europe lived with dirt in a friendly way. Henry IV, King of France, was famously dirty. Upon learning that a nobleman had taken a bath, the king ordered that, to avoid the attack of disease, the nobleman should not go out.Though the belief in the merit of dirt was long-lived, dirt has no longer been regarded as a nice neighbor ever since the 18th century. Scientifically speaking, cleaning away dirt is good to health. Clean water supply and hand washing are practical means of preventing disease. Yet, it seems that standards of cleanliness have moved beyond science since World War Ⅱ. Advertisements repeatedly sell the idea; clothes need to be whiter than white, cloths ever softer, surfaces to shine. Has the hate for dirt, however, gone too far?Attitudes to dirt still differ hugely nowadays. Many first&shy;time parents nervously try to warn(警告) their children of touching dirt, which might be responsible for the spread of disease. On the contrary, Mary Ruebush, an American。

[小初高学习]河南省济源四中2018-2019学年高二英语暑假开学考试测试试题

[小初高学习]河南省济源四中2018-2019学年高二英语暑假开学考试测试试题

济源四中2017级高二开学考试英语试题(时间:100分钟分值:150分)第一部分:阅读理解(共两节,满分40分)第一节:(共15小题;每小题2分,满分30分)AEditor: Today our topic is part-time job. Are they good for school children or not? Headmaster: Certainly not. Children have got two full-time jobs already: growing up and going to school. Part-time jobs make them so tired that they fall asleep in class. Mrs. White:I agree. I know school hours are short, but there’s homework as well, and children need a lot of sleep.Mr. White:Young children, perhaps some boys, s tay at school until they’re eighteen or nineteen. A part-time job can’t harm them. In fact, it’s good for them. They earn their pocket money instead of asking their parents for it. And they see something of the world outside school.Businessman:You’re qu ite right. Boys learn a lot from a part-time job. And we mustn’t forget that some families need the extra money. If the pupils didn’t take part-time jobs, they couldn’t stay at school.Editor: Well, we have got two for, and two against. What do our readers think?21. Who have the same opinion?A. Headmaster and Mrs. White.B. Editor and Mr. White.C. Mr. and Mrs. White.D. Businessman and Headmaster.22. Mrs. White thinks the young children maybe ________.A. need to stay at school until they are eighteen or nineteenB. need to have some pocket moneyC. should see something of the world outside schoolD. need to have a lot of sleep23. What does the editor think of part-time jobs?A. They can help students from poor families.B. They are good for school children.C. They cannot harm school children.D. We are not told.BCold weather can be hard on pets, just like it can be hard on people. Sometimes owners forget that their cats are just as used to the warm shelter (住所) as they are. Some owners will leave their animals outside for a long period of time, thinking that all animals are used to living outdoors. This can put their pets in danger of serious illness. There are things you can do to keep your animal warm and safe.Keep your pets inside as much as you can when the weather is bad. If you have to take them out, stay outside with them. When you’re cold enough to go inside, they probably are too. If you must leave them outside for a long time, make sure they have a warm, solid shelter against the wind, thick bedding, and plenty of non-frozen water.If left alone outside, dogs and cats can be very smart in their search for warm shelter. They can dig into snow banks or hide somewhere. Watch them closely when they are left outdoors, and provide them with shelter of good quality. Keep an eye on your pet’s water. Sometimes owners don’t realize that a water bowl has frozen and their pet can’t get anything todrink. Animals that don’t have clean and unfrozen water may drink dirty water outside, which may contain something unhealthy for them.24. What do we learn about pets from Paragraph 1? ________.A. They are often forgotten by their ownersB. They like to stay in warm placesC. They build their own sheltersD. They are used to living outdoors25. Why are pet owners asked to stay with their pets when they are out in coldweather?_______.A. To help them find sheltersB. To keep them companyC. To know when to bring them insideD. To keep them from eating bad food26. If pets are left on their own outdoors in cold weather, they may ________.A. get lost in the wildB. run short of clean waterC. dig deep holes for funD. make the water in the bowl dirty27. What is the purpose of this text? ________.A. To give practical adviceB. To solve an argumentC. To tell an interesting storyD. To present a research resultCGetting rid of dirt(灰尘;尘土;污物), in the opinion of most people, is a good thing. However, there is nothing fixed about attitudes to dirt.In the early 16th century, people thought that dirt on the skin was a way to block out disease, as medical opinion had it that washing off dirt with hot water could open up the skin and let illnesses in. A particular danger was thought to lie in public baths. By 1538, the French king had closed the bath houses in his kingdom. So did the king of England in 1546. Thus it began a long time when the rich and the poor in Europe lived with dirt in a friendly way. Henry IV, King of France, was famously dirty. Upon learning that a nobleman had taken a bath, the king ordered that, to avoid the attack of disease, the nobleman should not go out.Though the belief in the merit of dirt was long-lived, dirt has no longer been regarded as a nice neighbor ever since the 18th century. Scientifically speaking, cleaning away dirt is good to health. Clean water supply and hand washing are practical means of preventing disease. Yet, it seems that standards of cleanliness have moved beyond science since World War Ⅱ. Advertisements repeatedly sell the idea; clothes need to be whiter than white, cloths ever softer, surfaces to shine. Has the hate for dirt, however, gone too far?Attitudes to dirt still differ hugely nowadays. Many first&shy;time parents nervously try to warn(警告) their children of touching dirt, which might be responsible for the spread of disease. On the contrary, Mary Ruebush, an Americanimmunologist(免疫学家), encourages children to play in the dirt to build up a strong immune system(免疫系统). And the latter position is gaining some ground.28.The kings of France and England in the 16th century closed bath houses because .A.they lived healthily in a dirty environmentB.they thought bath houses were to dirty to stay inC.they believed disease could be spread in public bathsD.they considered bathing as the cause of skin disease?29.Which of the following best describes Henry IV’s attitude to bathing?A.ApprovingB.AfraidC.CuriousD.Uninterested30.How does the passage mainly develop?A.By providing examplesB.By following the order of importanceC.By making comparisonsD.By following the order of time31.What is the author’s purpose in writing the passage?A.To present the change of views on dirtB.To stress the role of dirtC.To call attention to the danger of dirtD.To introduce the history of dirtDTheodor Seuss Geisel was born in Springfield, Massachusetts in 1904. He was famous because of the books he wrote for children. They combine funny words, pictures, and social opinion.Dr Seuss wrote his first book for children in 1937. It is called And to Think I Saw It on Mulberry Street. A number of publishers refused to publish it. They said it was too different. A friend finally published it. Soon other successful books followed. Over the years, he wrote more than forty children’s books. They were fun to read. Yet his books sometimes dealt with serious subjects.By the middle 1940s, Dr Seuss had become one of the best-loved and most suc cessful writers of children’s books. He had a strong desire to help children. In 1954, Life magazine published a report about school children who could not read. The report said many children’s books weren’t interesting. Dr Seuss decided to write books that were interesting and easy to read.In 1957, Dr Seuss wrote The Cat in the Hat. He used less than 225 words to write the book. This was about the number of words a six-year-old should be able to read.The story is about a cat who tries to entertain two children on a rainy day while their mother is away from home. The cat is not like normal cats. It talks. The book was an immediate success. It was an interesting story and was easy to read. Children loved it. Their parents loved it, too. Today many adults say it is still one of the stories they like best.32. What’s the best title for this passage?A. Some of Dr Seuss’ books for children.B. What are Dr Seuss’s books mainly about?C. Dr Seuss —a famous writer of children’s books.D. Why are Dr Seus s’ books different?33. What do we know about Dr Seuss’s first book for children?A. It was Dr Seuss’ worst book.B. It dealt with a very serious subject.C. Neither children nor adults like it.D. Many publishers didn’t take it seriously at first.34. How did Dr Seuss help children according to Paragraph 3?A. By asking others to help them in magazines.B. By writing interesting and simple books.C. By changing his old books into simpler ones.D. By giving them books for free.35. Adults most probab ly think that Dr Seuss’ The Cat in the Hat is _________A. interestingB. seriousC. difficultD. boring第二节(共5小题;每小题2分,满分10分)根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。

【配套K12】[学习]河南省济源四中2019届高三物理上学期第一次质量检查试题

【配套K12】[学习]河南省济源四中2019届高三物理上学期第一次质量检查试题

济源四中2018—2019学年上学期第一次质量检测高三物理试题(时间:90分钟分值:100分)第I卷(选择题,共60分)一、选择题(本题共15小题,每小题4分,共60分。

第1~11题单选,第12~15题多选。

全部选对的得4分,少选的得2分,错选或不选的得0分)1.下列说法中正确的是()A. 物体运动的速度越大,加速度也一定越大B. 物体的加速度越大,它的速度一定越大C. 加速度就是“增加出来的速度”D. 加速度反映速度变化的快慢,与速度、速度的变化量无关2.下列关于惯性的说法中,正确的是()A. 物体只有在静止或做匀速直线运动时才有惯性B. 抛出去的物体,脱手后能继续向远处运动靠的是惯性C. 同一物体在地球上的惯性比在月球上的惯性大D. 物体在高速运动时不容易停下来,所以物体的速度越大,惯性越大3.关于作用力、反作用力和一对平衡力的认识,正确的是()A. 一对平衡力的合力为零,作用效果相互抵消,一对作用力与反作用力的合力也为零,作用效果也相互抵消B. 作用力和反作用力同时产生、同时变化、同时消失,且性质相同,平衡力的性质却不一定相同C. 作用力和反作用力同时产生、同时变化、同时消失,且一对平衡力也是如此D. 先有作用力,接着才有反作用力,一对平衡力却是同时作用在同一个物体上4.如图,一小球放置在木板与竖直墙面之间,设墙面对球的压力大小为,球对木板的压力大小为。

以木板与墙连接点所形成的水平直线为轴,将木板从图示位置开始缓慢地转到水平位置。

不计摩擦,在此过程中()A.始终减小,始终减小B. 始终减小,始终增大C. 先增大后减小,始终减小D.先增大后减小,先减小后增大5.一质点沿x 轴正方向做直线运动,通过坐标原点时开始计时,其-t 图象如图所示,则( ) A. 质点做匀速直线运动,速度为0.5 m/s B. 质点做匀加速直线运动,加速度为0.5 m/s 2C. 质点在1 s 末速度为2 m/sD. 质点在第1 s 内的位移大小为2 m6.如图所示,一只小鸟沿着较粗的均匀树枝从右向左缓慢爬行,在小鸟从A 运动到B 的过程中( )A.树枝对小鸟的合力先减小后增大B.树枝对小鸟的摩擦力先增大后减少C.树枝对小鸟的弹力先增大后减少D.树枝对小鸟的弹力保持不变7.如下图所示,有两个相同材料物体组成的连接体在斜面上运动,当作用力F —定时,m 2所受绳的拉力F T ( )A.与θ有关B.与斜面动摩擦因数有关C.与系统运动状态有关D. 212T m FF m m =+,仅与两物体质量有关8.如图所示,质量相等的三个物块A 、B 、C ,A 与天花板之间、B 与C 之间均用轻弹簧相连,A 与B 之间用细绳相连,当系统静止后,突然剪断AB 间的细绳,则此瞬间A 、B 、C 的加速度分别为(取向下为正)( ) A. ﹣g 、2g 、0 B. ﹣2g 、2g 、0 C. ﹣2g 、2g 、gD. ﹣2g、g、g9.如图所示,有黑白两条毛巾交替折叠地放在地面上,白毛巾的中部用线与墙壁连接着,黑毛巾的中部用线拉住,设线均呈水平.欲将黑白毛巾分离开来,设每条毛巾的质量均为m,毛巾之间及其跟地面间的动摩擦因数均为μ,则将黑毛巾匀速拉出需用的水平拉力为()A. 2μmgB. 4μmgC. 5μmgD. μmg10.重为G的两个完全相同的小球,与水平面间的动摩擦因数均为μ.竖直向上的较小的力F 作用在连接两球轻绳的中点,绳间的夹角α=60°,如图所示,缓慢增大F到两球刚要运动的过程中,下列说法正确的是( )A.地面对球的支持力变大B.球刚开始运动时,地面对球没有支持力C.地面对球的摩擦力变小D.球刚开始运动时,球受到的摩擦力最大11.如图所示,不计质量的光滑小滑轮用细绳悬挂于墙上O点,跨过滑轮的细绳连物块a、b,a、b都处于静止状态现将物块b移至C点后,a、b仍保持静止,下列说法中正确的是 ( )A.b与水平面间的摩擦力减小B.地面对b的弹力减小C.悬于墙上的绳所受拉力不变、、三角相等D.a、b静止时,图中αβθ12.原来做匀速运动的升降机内有一被伸长弹簧拉住的具有一定质量的物体A静止在地板上,如图所示,现发现A突然被弹簧拉向右方,最大静摩擦力等于滑动摩擦力.由此可判断,此时升降机做的运动可能是( )A.加速上升B.减速上升C.加速下降D.减速下降13. 物体A放在物体B上,物体B放在光滑的水平面上,已知m A=6kg,m B=2kg,A、B间动摩擦因数μ=0.2,如图所示.现用一水平向右的拉力F作用于物体A上,则下列说法中正确的是(g=10m/s2)()A. 当拉力F<48N时,A相对B静止不动B. 当拉力F>12N时,A相对B一定不滑动C. 无论拉力F多大,A相对B始终静止D. 当拉力F=24N时,A对B的摩擦力等于6N14.如图所示,放在水平桌面上的木块A处于静止状态,所挂的砝码和托盘的总质量为0.6kg,弹簧测力计的读数为2N,若轻轻取走盘中的部分砝码,使砝码和托盘的总质量减小到0.3kg时,将会出现的情况是(不计滑轮摩擦,g取10m/s2)()A. 单簧测力计的读数将变小B. A仍静止不动C. A对桌面的摩擦力不变D. A对桌面的摩擦力变小15.如图所示,光滑斜面CA、DA、EA都以AB为底边。

河南省济源四中2018-2019学年高一物理上学期第一次质量检查试题

河南省济源四中2018-2019学年高一物理上学期第一次质量检查试题

济源四中2018-2019学年上学期第一次质量检测高一物理试题(时间:50分钟分值:100分)第Ⅰ卷(选择题共72分)一、单项选择题(只有一项是正确答案)1.在物理学中,突出问题的主要方面,忽略次要因素,建立理想化的物理模型,是经常采用的一种科学研究方法.质点就是这种物理模型之一.关于地球能否看作质点,下列说法正确的是( )A.地球的质量太大,不能把地球看作质点B.地球的体积太大,不能把地球看作质点C.研究地球的自转时可以把地球看作质点D.研究地球绕太阳公转时可以把地球看作质点2. 下列各组物理量中,全部是矢量的有()A.位移、速度、平均速度、加速度 B.速度、平均速率、加速度、位移C.位移、速度、加速度、质量 D.速度、加速度、位移、时间3.关于速度和加速度的关系,下列说法中正确的是()A、速度变化越大,加速度就一定越大B、速度为零,加速度就一定为零C、速度很小,加速度一定很大D、速度很大,加速度可能是零4.某质点向东运动12m,又向西运动20m,又向北运动6m,则它运动的路程和位移大小分别是()A. 14m,10m B. 38m,10m C. 14m,6m D. 38m,6m5.如图所示A、B两个运动物体的x-t图象,直线为B物体,折线为A物体,正确的是()A.A、B两个物体开始时相距100m,同时同向运动B.B物体做匀减速直线运动,加速度大小为5m/s2C.A、B两个物体运动8s时,在距A的出发点60m处相遇D.A物体在2s到6s之间做匀速直线运动6.如图为一物体做直线运动的v-t图像,分别用v1、a1表示物体在0-t1时间内的速度与加速度,v2、a2表示物体在t1-t2时间内的速度与加速度,下列说法正确的是()A .v 1与v 2方向相同,a 1与a 2方向相反B .v 1与v 2方向相反,a 1与a 2方向相同C .v 1与v 2方向相反,a 1与a 2方向相反D .v 1与v 2方向相同,a 1与a 2方向相同7.一个质点做方向不变的直线运动,加速度的方向始终与速度方向相同,但加速度的大小逐渐减小直至为零.则在此过程中( )A .速度逐渐减小,当加速度减小为零时,速度达最小值B .速度逐渐增加,当加速度减小为零时,速度达最大值C .位移逐渐增大,当加速度减小为零时,位移不再增大D .位移逐渐减小,当加速度减小为零时,位移达最小值8.某人爬山,从山脚爬上山顶,然后又从原路反回到山脚,上山的平均速率为v 1,下山的平均速率为v 2,则往返的平均速度的大小和平均速率是( )A .221v v +,221v v +B .221v v -,221v v - C .0,2121v v v v +- D .0,21212v v v v +二、多项选择题(有一个以上正确答案)9.电磁打点计时器是一种使用交流电源的计时仪器,根据打点计时器打出的纸带,我们可以从纸带上直接得到的物理量是()A.时间间隔 B.位移 C.加速度 D.平均速度10.做直线运动的物体初速度大小为6m/s,经过2s速度的大小变为10m/s,则该物体的加速度大小可能是()A.8.0m/s2 B.1.4 m/s2 C.2.0 m/s2 D.2.6 m/s211.如图所示是某质点的v-t图像,则()A.在1s到3s内质点静止B.前1s质点做加速运动,后1s质点做减速运动C.前1s质点的加速度为3m/s2D.3s末质点的速度为3m/s12.一质点做加速度恒定的运动,初速度大小为2m/s,3s后末速度大小变为4m/s,则下列判断正确的是()A.速度变化量的大小可能小于2m/s B.速度变化量的大小可能大于2m/sC.加速度大小一定小于6m/s2 D.加速度大小一定大于6m/s2三、计算题(共2小题,每题14分,共28分.解答应写出必要的文字说明、方程式和重要演算步骤,只写出最后答案不能得分,有数值计算的题,答案中必须明确写出数值和单位) 13.物体沿直线运动,若:(1)前一半时间内的平均速度为v1,后一半时间内的平均速度为v2,则全程的平均速度为多少?(2)前一半位移的平均速度为v1,后一半位移的平均速度为v2,则全程的平均速度为多少?14.升降机由静止开始以a1加速上升2s,速度达到6m/s,接着匀速上升10s,最后再以加速度为a2减速上升3s才停下来。

济源市高中2018-2019学年高二上学期9月月考物理试卷含解析

济源市高中2018-2019学年高二上学期9月月考物理试卷含解析

济源市高中2018-2019学年高二上学期9月月考物理试卷含解析班级__________ 座号_____ 姓名__________ 分数__________一、选择题1.如图所示,一个绝缘且内壁光滑的环形细圆管,固定于竖直平面内,环的半径为R(比细管的内径大得多),在圆管内的最低点有一个直径略小于细管内径的带正电小球处于静止状态,小球的质量为m,带电荷量为q,重力加速度为g.空间存在一磁感应强度大小未知(不为零),方向垂直于球形细圆管所在平面且向里的匀强磁场.某时刻,给小球一方向水平向右,大小为v0=的初速度,则以下判断正确的是()A. 无论磁感应强度大小如何,获得初速度后的瞬间,小球在最低点一定受到管壁的弹力作用B. 无论磁感应强度大小如何,小球一定能到达环形细管的最高点,且小球在最高点一定受到管壁的弹力作用C. 无论磁感应强度大小如何,小球一定能到达环形细管的最高点,且小球到达最高点时的速度大小都相同D. 小球从环形细圆管的最低点运动到所能到达的最高点的过程中,机械能不守恒2.2009年5月,航天飞机在完成对哈勃空间望远镜的维修任务后,在A点从圆形轨道Ⅰ进入椭圆轨道Ⅱ,B为轨道Ⅱ上的一点,如图所示,关于航天飞机的运动,下列说法中正确的有()A.在轨道Ⅱ上经过A的速度小于经过B的速度B.在轨道Ⅱ上经过A的动能小于在轨道Ⅰ上经过A的动能C.在轨道Ⅱ上运动的周期小于在轨道Ⅰ上运动的周期D.在轨道Ⅱ上经过A的加速度小于在轨道Ⅰ上经过A的加速度3.下列所描述的运动中,一定不存在的是()A.路程很长而位移很小B.速度变化量很大而加速度很小C.速度变化越来越快而加速度却越来越小D.瞬时速度越来越大而加速度越来越小4.如图所示,一个带负电的滑环套在水平且足够长的粗糙的绝缘杆上,整个装置处于方向如图所示的匀强磁场B中。

现给滑环施以一个水平向右的瞬时冲量,使其由静止开始运动,则滑环在杆上的运动情况可能是()A.始终作匀速运动B .开始作减速运动,最后静止于杆上C .先作加速运动,最后作匀速运动D .先作减速运动,最后作匀速运动5. 在匀强磁场内放置一个面积为S 的线框,磁感应强度为B ,线框平面与磁场方向垂直,穿过线框所围面积的磁通量,下列关系正确的是 A.B.C.D.6. 小球从空中自由下落,与水平地面相碰后弹到空中某一高度,其v t -图象如右图所示,则由图可知( ) A .小球下落的最大速度为3m/s B .小球下落过程中加速度小于g C .小球能弹起的最大高度为0.45m D .小球能弹起的最大高度为1.25m7. 关于自由落体运动,下列说法中不正确的是( ) A .自由落体运动是竖直方向的匀加速直线运动B .前3s 竖直方向的位移只要满足123::x x x =1∶4∶9的运动一定是自由落体运动C .自由落体运动在开始的连续三个2s 内的位移之比是1∶3∶5D .自由落体运动在开始的连续三个2s 末的速度之比是1∶2∶38. 放在粗糙水平面上的物块A 、B 用轻质弹簧秤相连,如图所示,物块与水平面间的动摩擦因数均为μ,今对物块A 施加一水平向左的恒力F ,使A 、B 一起向左匀加速运动,设A 、B 的质量分别为m 、M ,则弹簧秤的示数( )A .MF M m + B .MF mC .()F m M g M m μ-+D .()F m M gM m Mμ-++9. 如图所示,A 、B 两质点作直线运动的速度图象,已知两质点在同一直线上运动,由图可知( )A .两质点一定从同一位置出发B .两质点一定同时由静止开始运动C .2t 秒末两质点相遇D .0~2t 秒时间内B 质点一定领先A 质点10.如右图所示,以8m/s 匀速行驶的汽车即将通过路口,绿灯还有2s 将熄灭,此时汽车距离停车线18m 。

济源市高中2018-2019学年高二上学期第二次月考试卷物理

济源市高中2018-2019学年高二上学期第二次月考试卷物理

济源市高中2018-2019学年高二上学期第二次月考试卷物理班级__________ 座号_____ 姓名__________ 分数__________一、选择题1.(2018南宁高三摸底考试)中国北斗卫星导航系统(BDS)是中国自行研制的全球卫星导轨系统,是继美国全球定位系统(GPS)、俄罗斯格洛纳斯卫星导航系统(GLONASS)之后第三个成熟的卫星导航系统。

预计2020年左右,北斗卫星导航系统将形成全球覆盖能力。

如图所示是北斗导航系统中部分卫星的轨道示意图,已知a、b、c三颗卫星均做圆周运动,a是地球同步卫星,则()A.卫星a的角速度小于c的角速度B.卫星a的加速度大于b的加速度C.卫星a的运行速度大于第一宇宙速度D.卫星b的周期等于24 h2.在物理学发展的过程中,许多物理学家的科学研究推动了人类文明的进程.在对以下几位物理学家所作科学贡献的叙述中,正确的说法是A.在对自由落体运动的研究中,伽利略猜想运动速度与下落时间成正比,并直接用实验进行了验证B.牛顿应用“理想斜面实验”推翻了亚里士多德的“力是维持物体运动的原因”观点C.胡克认为只有在一定的条件下,弹簧的弹力才与弹簧的形变量成正比D.亚里士多德认为两个从同一高度自由落下的物体,重物体与轻物体下落一样快3.(2018·洛阳联考)如图所示,一个电荷量为-Q的点电荷甲,固定在绝缘水平面上的O点。

另一个电荷量为+q、质量为m的点电荷乙,从A点以初速度v0沿它们的连线向甲运动,运动到B点时速度为v,且为运动过程中速度的最小值。

已知点电荷乙受到的阻力大小恒为f,A、B两点间距离为L0,静电力常量为k,则下列说法正确的是()A.点电荷乙从A点向甲运动的过程中,加速度先增大后减小B .点电荷乙从A 点向甲运动的过程中,其电势能先增大再减小C .O 、B 两点间的距离为kQqfD .在点电荷甲形成的电场中,A 、B 两点间的电势差为U AB =fL 0+12mv 2q4. (2016·山东枣庄高三期末)如图所示,不带电的金属球A 固定在绝缘底座上,它的正上方有B 点,该处有带电液滴不断地自静止开始落下(不计空气阻力),液滴到达A 球后将电荷量全部传给A 球,设前一液滴到达A 球后,后一液滴才开始下落,不计B 点未下落带电液滴对下落液滴的影响,则下列叙述中正确的是( )A .第一滴液滴做自由落体运动,以后液滴做变加速运动,都能到达A 球B .当液滴下落到重力等于电场力位置时,开始做匀速运动C .能够下落到A 球的所有液滴下落过程所能达到的最大动能不相等D .所有液滴下落过程中电场力做功相等5. 如图所示,回旋加速器D 形盒的半径为R ,所加磁场的磁感应强度为B ,用来加速质量为m 、电荷量为q 的质子(H 11),质子从下半盒的质子源由静止出发,加速到最大能量E 后,由A 孔射出.则下列说法正确的是( ) A .回旋加速器加速完质子在不改变所加交变电压和 磁场情况下,可以直接对 (He 24)粒子进行加速B .只增大交变电压U ,则质子在加速器中获得的最大能量将变大C .回旋加速器所加交变电压的频率为2mE 2πmRD .加速器可以对质子进行无限加速6. (2016·江苏苏北四市高三联考)某踢出的足球在空中运动轨迹如图所示,足球视为质点,空气阻力不计。

济源市高中2018-2019学年高二上学期第三次月考试卷物理

济源市高中2018-2019学年高二上学期第三次月考试卷物理

济源市高中2018-2019学年高二上学期第三次月考试卷物理班级__________ 座号_____ 姓名__________ 分数__________一、选择题1.如图所示,在光滑的水平面上,质量分别为m1和m2的木块A和B之间用轻弹簧相连,在拉力F作用下,以加速度a做匀加速直线运动。

某时刻突然撤去拉力F,此瞬时A和B的加速度为a1和a2,则A.a1=a2=0B.a1=1,a2=0C.,D.,【答案】D【解析】t=时,甲、乙两汽车从相距70m的两地开始相向行驶,他们的v t-图像如图所示.忽略汽车掉头所需2.0时间.下列对汽车运动情况的描述正确的是()A. 在第1s末,乙车改变运动方向B. 在第2s末,甲乙两车相距10mC. 在前4s内,乙车运动加速度的大小总比甲车的大D. 在第4s末,甲乙两车相遇【答案】BC3.如图所示,一束含有、的带电粒子束从小孔O1处射入速度选择器,其中沿直线O1O2运动的粒子在小孔O2处射出后垂直进入偏转磁场,最终打在P1、P2两点,不计粒子间的相互作用。

则A.打在P1点的粒子是B.O2P2的长度是O2P1长度的2倍C.粒子与粒子在偏转磁场中运动的时间之比为2:1D.粒子与粒子在偏转磁场中运动的时间之比为1:1【答案】B【解析】带电粒子在磁场中做匀速圆周运动,洛伦兹力提供向心力,所以,所以,可知粒子的比荷越大,则运动的半径越小,所以打在P1点的粒子是,打在P2点的粒子是,故A错误;因粒子与粒子在偏转磁场中运动的半径比为1:2,则O2P1和O2P2长度之比为1:2,选项B正确;带电粒子在沿直线通过速度选择器时,电场力与洛伦兹力大小相等方向相反,即:qvB=qE,所以,可知从粒子速度选择器中射出的粒子具有相等的速度;粒子运动的周期,则粒子与粒子在偏转磁场中运动的周期之比为1:2,运动半个周期,则时间之比也为1:2,选项CD错误。

4.如图甲一质量为M的长木板静置于光滑水平面上,其上放一质量为m的小滑块。

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济源四中2017级高二开学考试物理试题一、单选题(每题5分,共60分。

多选题选不全得3分,选错得0分。

)1.人类认识行星运动规律的曲折过程给我们的启示:从地心说的直接经验开始,到日心说的转变,不是简单的参考系的变化,而是人类思想的一次重大解放,从此人类的视野超越了地球,走向了宇宙。

关于科学家和他们的贡献,下列说法中与物理学的发展历史不相符合的是( ) A.腊科学家托勒密提出了地心说:认为地球是静止不动的,太阳、月亮和星星从人类头顶飞过,地球是宇宙的中心B.波兰天文学家哥白尼,发表著作《天体运行论》提出日心说,预示了地心宇宙论的终结C.德国天文学家开普勒对他的导师——第谷观测的行星数据进行了多年研究,得出了开普勒三大行星运动定律D.波兰天文学家哥白尼,提出了日心说,为此被宗教裁判所烧死在罗马的鲜花广场,为科学付出了生命的代价2.关于曲线运动,下列说法中正确的是( ) A.曲线运动物体的速度方向保持不变 B.曲线运动一定是变速运动C.物体受到变力作用时就做曲线运动D.曲线运动的物体受到的合外力可以为零3.在离地面离度为h ,离竖直光滑垴的水平距离为s 处,将一小球以的速度向墙水平抛出,如图所示,小球与墙碰撞后落地,不计碰撞时的时间和能量损失(碰撞前后竖直分速度保持不变,水平分速度大小相等,方向相反)。

小球落地点到墙的水平距离处,则撞击点离地面的竖直高度为( )A. 12hB. 13hC. 716hD. 916h4.如图所示,物体A 、B 通过细绳及轻质弹簧连接在轻滑轮两侧,物体A 、B 的质量都为m ,开始时细绳伸直,用手托着物体A ,使弹簧处于原长,此时A 距地面的高度为h ,物体B 静止在地面上.放手后物体A 下落,与地面即将接触时速度大小为v ,此时物体B 对地面恰好无压力,则下列说法中正确的是( )A.弹簧的劲度系数为mghB.此时弹簧的弹性势能等于212mgh mv C.此时物体B 的速度大小也为vD.此时物体A 的加速度大小为g ,方向竖直向上5.一个排球在A 点被竖直向上抛出时动能为30J ,上升到最大高度后,又回到A 点,动能变为12J ,设排球在运动过程中受到的空气阻力大小恒定,则( )A.从最高点回到A 点过程克服阻力做功18JB.上升到最高点过程机械能减少了18JC.从最高点回到A 点过程重力势能减少了12JD.上升到最高点过程重力势能增加了21J6.我国自主研制的“嫦娥三号”,携带“玉兔”月球车已于2013年12月2日1时30分在西昌卫星发射中心发射升空,落月点有一个富有诗意的名字“广寒宫”。

若已知月球质量为,半径为R ,引力常量为G ,以下说法正确的是( )A.若在月球上发射一颗绕月球做圆周运动的卫星,则最大运行速度为B.若在月球上发射一颗绕月球做圆周运动的卫星,则最小周期为C.若在月球上以较小的初速度0v 竖直上抛一个物体,则物体上升的最大高度为D.若在月球上以较小的初速度0v 竖直上抛一个物体,则物体从抛出到落回抛出点所用时间为7.如图所示,从倾角为θ的足够长的斜面顶端P 以速度0v 抛出一个小球,落在斜面上某处Q 点,小球落在斜面上的速度与斜面的夹角为α,若把初速度变为30v ,小球仍落在斜面上,则以下说法正确的是( )A.夹角α将变大B.夹角α与初速度大小无关C.小球在空中的运动时间不变D. P 、Q 间距是原来间距的3倍8.理论上已经证明:质量分布均匀的球壳对壳内物体的万有引力为零。

现假设地球是半径为R 、质量分布均匀的实心球体, O 为球心,以O 为原点建立坐标轴Ox ,如图所示,一个质量一定的小物体(假设它能够在地球内部移动)。

设在 112x R =与232x R =处所受到地球对它的万有引力分别为1F 和2F ,则1F 、2F 的值为( )A.9:8B.8:9C.2:3D.3:29.如图所示,两个可视为质点的、相同的木块甲和乙放在转盘上,两者用长为L 的细绳连接(细绳能够承受足够大的拉力),木块与转盘的最大静摩擦力均为各自重力的K 倍,两物体间连一细线,此线过圆心。

甲到圆心距离1r ,乙到圆心距离2r ,且123,24L Lr r ==,水平圆盘可绕过圆心的竖直轴OO '转动,两物体随圆盘一起以角速度做匀速转动。

下述所取值范围已保证甲和乙相对圆盘无滑动,则:(已知重力加速度为g )( )A.若ω≤时,甲、乙所受静摩擦力都指向圆心B.取不同值时,甲所受静摩擦力始终指向圆心;乙所受静摩擦力可能指向圆心,也可能背向圆心C.取不同值时,乙所受静摩擦力始终指向圆心;甲所受静摩擦力可能指向圆心,也可能背向圆心D.如果ω>,两物体将相对圆盘发生滑动 10.质量为m 的小球系在轻杆一端,在竖直平面内做半径为R 的圆周运动,运动过程中小球受到空气阻力作用.某时刻,小球通过轨道最低点,轻杆对球的拉力大小为7mg ,此后小球做圆周运动,经过半周到达最高点时,杆对球的作用力大小为12mg ,则在这半周中小球克服空气阻力所做的功可能是( )A. 14mgRB.12mgR C. 34mgRD. mgR 11.如图所示,自由下落的小球从它接触弹簧开始,到弹簧压缩到最短的过程中,如果不计空气阻力,并且弹簧的形变始终没有超过弹性限制,则( )A.小球的加速度先减小后增大B.小球的速度一直减小C.小球的机械能一直减小D.小球的重力势能和弹簧的弹性势能之和先增大后减小12.发射地球同步卫星时,先将卫星发射至近地圆轨道1,在Q 点经点火将卫星送入椭圆轨道2;然后在P 点再次点火,将卫星送入同步轨道3,如图所示,已知轨道1、2相切于P 点,则当卫星分别在轨道1、2、3上正常运行时,下列说法中正确的是( )A.卫星在轨道3上的速率大于在轨道1上的速率B.卫星在轨道2上运行的周期大于在轨道1上的运行周期C.卫星在轨道1上经过Q 点时的加速度大于它在轨道2上经过Q 点时的加速度D.卫星在轨道3上运行时的机械能大于在轨道1上运行时的机械能二、实验题(每空2分,共12分。

)13.某物理兴趣小组在探究平抛运动的规律实验时,将小球做平抛运动,用频闪照相机对准方格背景照相,拍摄到了如图所示的照片,但照片上有一破损处.已知每个小方格边长9.8cm ,当地的重力加速度为29.8/g m s .(1)若以拍摄的第1个点为坐标原点,水平向右和竖直向下为正方向,则照片上破损处的小球位置坐标为__________.(2)小球平抛的初速度大小为__________. 14.根据所学知识回答问题(1)利用重锤的自由下落和电磁打点计时器验证机械能守恒定律,下面哪些实验仪器是必需的?__________(填写仪器前的字母代号). A.天平B.4~6V 的低压交流电源C.4~6V 的低压直流电源D.刻度尺E.秒表 (2)重锤质量为m ,打点计时器的打点周期为T ,在实验中,选定了一条较为理想的纸带,如图所示,在打点计时器打点“1”到打点“4”的过程中,重锤动能增量的表达式为__________,重力势能减少量的表达式为__________,实验中重力势能的减少量总是大于动能增量,主要的原因是__________.三、计算题(28分)15.(10分)传送带以6?/v m s =的速度顺时针转动,一小物块轻轻放在传送带左端B 点,然后在传送带的带动下,从传送带右端的C 点水平抛出,最后落到地面上的D 点,己知传送带长度12L m =,物块与传送带之间的动摩擦因数0.2μ= (210/g m s =).(1)求物块在传送带上运动的时间;(2)若物块落在D 点的速度方向与地面夹角为45α=︒,求C 点到地面的高度和C 、D 两点间的水平距离.16.(8分)宇航员乘坐宇宙飞船到达一未知行星,进行科学观测:宇航员在该行星地面附近h 处自由释放一个小球,测得落地时间为t .已知该行星半径为R ,万有引力常量为G ,求: (1)该行星的第一宇宙速度; (2)该行星的平均密度.17.(10分)如图所示的装置叫做阿特伍德机,是阿特伍德创制的一种著名力学实验装置.绳子两端的物体下落(上升)的加速度总是小于自由落体的加速度g ,同自由落体相比,下落相同的高度,所花费的时间要长,这使得实验者有足够的时间从容的观测、研究.已知物体A 、B 的质量相等均为M ,物体C 的质量为m ,轻绳与轻滑轮间的摩擦不计,轻绳不可伸长且足够长,如果14m M =,将BC 由静止释放,下落距离为H ,此时A 未与滑轮接触,求: (1)此时A 的速度大小;(2)此过程中B 对C 做的功.高二开学考试物理参考答案 一、选择题1-5 DBCAD 6-8 CBA 9、ACD 10、AC 11、AC 12、BD 二、实验题13.答案:1. ()58.8,58.8cm cm2.1.96m/s解析:1.根据平抛运动的特点,水平方向的坐标为: 329.858.8cm cm ⨯⨯=; 竖直方向: ()1239.858.8y cm cm =++⨯=;故没有被拍摄到的小球位置坐标为: ()58.8,58.8cm cm ;2.由2h gt ∆=,得: 0.1t s ==由2029.810 1.96/0.1x v m s t -⨯⨯===; 故答案为1.96/m s14.答案:1.BD; 2. ()22?22532/8/8m s s T ms T --;41()mg s s -;存在阻力三、计算题15.答案:1. 设物块在传送带上的加速度为a ,经过1t 时间与传送带速度相同, 有mg ma μ=,1v at =,解得: 13t s =.设物块在1t 时间内的位移为x ,由212x at =, 代入数据解得: 9x m =.因为2x L <,所以物块还将在传送带上做一段匀速运动,设匀速运动的时间为2t , 有22L x vt -=, 得: 20.5t s =.则物块在传送带上运动的时间为1230.5 3.5?t t t s s =+=+=. 2. Dy Ctan v v α=,代入数据解得6/Dy v m s =.22Dy v gh =,代入数据解得 1.8h m =. 设平抛的时间为3t ,有3Dy v gt =, 得: 30.6?t s =.则平抛的水平位移: 3C x v t =,得 3.6x m =. 16.答案:1. 小球做自由落体运动212h gt =, 解得: 22h g t =, 22Mm v G m R R=, 星球表面质量为0m 的物体所受重力等于行星对它的万有引力, 002Mm m g G R =,解得行星的第一宇宙速度v =2. 由第一问可得222hR M Gt =,M Vρ=, 解得232hGt R ρπ=.17.答案:1.对整体用动能定理可得:2111424M M gH MgH M M M v ⎛⎫⎛⎫+-=++ ⎪ ⎪⎝⎭⎝⎭v =2.对C 动能定理:21110424Mgh W Mv +=- 29W MgH =-。

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