碰撞前后质点系总动能不发生变化的碰撞称做完全弹性碰撞.在这类碰撞中,被碰物体速度为零的完全弹性碰撞在现实生活中较为常见.笔者结合生活中的现象将这一问题进行阐述,用四字口诀进行归纳,希望能够起到抛砖引玉的作用.如图1,设入射球的质量为m1,碰前的速 Collisions in which the total kinetic energy of the particle system does not change before and after the collision are called full elastic collisions. In this type of collision, the fully elastic collision with the object velocity of zero is more common in real life. The author combines the phenomenon in life to solve this problem. To elaborate, use the four-character recipe for induction, hoping to play a role in attracting attention. As shown in Figure 1, let the mass of the incident ball be m1.