高中物理力学竞赛相关的英文词汇和例题较多，以下列举一些常见的词汇及其例题：
英文词汇：
1. force（力）
2. tension（张力）
3. weight（重力）
4. inertia（惯性）
5. momentum（动量）
6. reaction（反作用力）
7. friction（摩擦力）
8. torque（扭矩）
9. displacement（位移）
10. velocity（速度）
11. acceleration（加速度）
12. equilibrium（平衡）
13. kinematics（动力学）
14. statics（静力学）
例题：
1. A box of mass 2 kg is pushed by a force of 5 N and slides a distance of 2 m. What is the box's velocity after the push?
答案：速度为5m/s。
2. A rubber band stretched between two points experiences a tension of 2 N. If the rubber band is released, what will be the direction and magnitude of the force it exerts on the points?
答案：橡胶带释放时，它对两点的力的大小和方向为2N。
3. A person standing on a scale experiences a weight of 50 N. How much force does the person exert on the scale?
答案：人站在秤上，秤显示为50N，那么人给秤施加的力是多少？
4. A cannon fires a bullet with a velocity of 200 m/s straight up into the air. After how long will it take for the bullet to hit the ground? Assume air resistance is negligible.
答案：炮弹以200m/s的速度向上发射到空中，忽略空气阻力，多久后它会落地？
以上例题仅供参考，建议查阅专业书籍或咨询专业人士以获取更多帮助。
高中物理力学竞赛英文：
Mechanics
例题：
Problem: A box is moving along a straight path with a constant velocity. The box is attached to a string that is attached to a frictionless pulley. If the box is moving at a speed of 2 m/s, and the pulley is rotating at a speed of 3 m/s, what is the tension in the string?
Solution:
To solve this problem, we need to apply Newton's second law of motion to the box and the string. We know that the box is moving with a constant velocity, so its velocity is constant. We also know that the pulley is rotating, but it has no friction, so its velocity is also constant.
The tension in the string acts in the opposite direction of the acceleration of the box. Since the box is moving with a constant velocity, its acceleration is zero, so the tension in the string must be equal to the weight of the box.
Therefore, we can apply Newton's second law of motion to the box and the string to solve this problem:
Fnet = ma + Ft = m(0) + mgt = mg = mg
where Fnet is the net force acting on the system, ma is the acceleration of the box, Ft is the tension in the string, m is the mass of the box, and mg is the weight of the box.
Since we know that Fnet = mg, we can solve for Ft = mg - ma = mgt - ma = m(g - a) = m(3m/s^2 - 2m/s^2) = 1m/s^2 10kg = 10N.
Therefore, the tension in the string is 10 N.
相关例题：
Problem: A person walks up a flight of stairs with a constant velocity. The person walks up one step at a time and each step has a height of h meters. If the person walks up a flight of stairs at a speed of v meters per second, how much work is done by gravity on the person?
Solution:
To solve this problem, we need to apply Newton's second law of motion to the person and apply work-energy principles. Work done by gravity on an object equals its change in kinetic energy.
The person walks up stairs one step at a time, so his velocity is changing with each step. However, we can approximate his velocity as constant because he walks up each step at a constant speed. Therefore, we can apply Newton's second law of motion to calculate the work done by gravity on the person:
Fnet = ma + mg = mv + mg = mv' - mv = mv'' - mv' = mg - ma = m(v'' - v') = mgh - Wg = mgh - m(v')^2/2g = mgh - (mv^2)/2
where Fnet is the net force acting on the person, mg is his weight, m is his mass, v is his velocity at any given time, v' is his velocity at one step up, v'' is his velocity at two steps up, h is the height of each step, and Wg is the work done by gravity on him.
Therefore, we can solve for Wg = mgh - (mv^2)/2 = (mgh) - (mv^2)/2.
If we approximate v as constant and use v = vt for t seconds, we can simplify this expression to Wg = (mgh) - (mgvt^2)/2.
高中物理力学竞赛英文和相关例题常见问题包括以下内容：
1. 什么是力？
2. 力的作用效果是什么？
3. 什么是牛顿运动定律？
4. 什么是动量守恒定律？
5. 如何计算重力加速度？
6. 如何计算摩擦力？
7. 如何计算弹性力？
8. 如何计算合力？
9. 如何计算物体的加速度？
10. 如何计算物体的速度变化量？
11. 如何计算物体的位移？
12. 如何应用牛顿运动定律解决实际问题？
13. 如何应用动量守恒定律解决实际问题？
14. 如何应用能量守恒定律解决实际问题？
相关例题：
1. 一个物体在水平面上受到一个大小为5N的水平力作用，该物体质量为2kg，求物体所受的摩擦力大小和方向。
2. 一个物体在斜面上受到一个大小为5N的推力作用，该物体质量为3kg，斜面倾角为30度，求物体所受的摩擦力大小和方向。
3. 一个物体在空气中下落时受到一个重力作用，该物体质量为5kg，求物体所受的重力加速度大小。
4. 一个物体在斜面上滑动时受到一个滑动摩擦力作用，该物体质量为2kg，斜面倾角为30度，求滑动摩擦力的大小和方向。
5. 一个物体在水平面上受到一个拉力作用，该物体质量为4kg，水平面与物体间的动摩擦因数为0.2，求物体所受的最大静摩擦力大小。
以上问题及答案均用英文表述，并提供了相关例题以便理解。这些问题是高中物理力学竞赛中常见的问题，通过解答这些问题，可以加深对力学知识的理解，提高解题能力。