kinetic hypothesis

例句：

1. 1.The kinetic energy of the projectile is equal to its mass times the acceleration due to gravity.
   投射物的动能等于其质量乘以由于重力引起的加速度。
2. 2.The kinetic energy of a ball thrown into the air is proportional to its initial velocity and inversely proportional to its mass.
   将球投入空中时，它的动能与初始速度成正比，与质量成反比。
3. 3. The kinetic energy of an object can be converted into thermal energy through collisions with other objects.
   物体通过与其他物体碰撞可以将其动能转换为热能。