高中物理必背知识点实用口诀

高中物理必背知识点实用口诀(TXT手机版)（Practical tips for

high school physics (TXT)）

1. Description of movement

1. Object model with particle size, ignore shape and size; The earth turns to be a particle, the earth's rotation is about the size. The change of the object position, accurate description with displacement, speed S movement than t, with Δv and t than a.

2. Using general formula, average velocity is simple method, intermediate time velocity method, initial velocity zero ratio method, and geometric image method, to solve the method of motion. The free fall is an instance, the initial velocity is zero a, etc. The speed of the center moment is equal to the average velocity; Acceleration has a good side, ΔS a T square, etc.

3. The velocity determines the motion of the object, in the direction of the acceleration of the velocity, the same direction is accelerated backward, and the vertical turning is the same.

Second, the force

1. Force analysis is the key to solve mechanical problems; Analyze the force of force and deal with it according to the effect.

2. The analysis force should be careful, quantitative

calculation of seven forces; The force of gravity is determined by the force of gravity. There is elasticity and friction, relative motion is the basis; The force of gravity is definite in all things. Lorenz force, the essence is unity; Vertical force is the largest, parallel inability to remember.

3. The calculation result is only "quantity" in the same direction. The two forces are small and large, two forces are q-angle clip, parallelogram method; The resultant force size varies with q, only in the maximum minimum, and the force of the force is combined to the other side.

The multi-force problem state, orthogonal decomposition to solve, trigonometric functions can be resolved.

4. Multiple methods of mechanical problems, integral isolation and hypothesis; All you need to do is look at the external force and solve the internal force isolation. The state is the same as the whole, otherwise it is much more isolated; Even if the state is different, the whole cow ii can be done; Suppose that some force is or is not, and is determined according to the calculation; The limit method grabs the critical state, the procedural law is done in order; Orthogonal decomposition coordinates, the axial vector is as much as possible.

Newton's laws of motion

1. F and other ma, Newton two law, produce acceleration, because of force.

So the net force is going in the same direction as a, so the