从能量的角度讨论质心系中的两体碰撞问题

A Discussion of Collision of Two Bodies in Center-of-mass System from the Viewpoint of Energy

从能量的角度出发,考察了在质心坐标系中两体对心碰撞前后体系动能的变化特点,重新讨论了恢复系统的物理意义,结果表明恢复系数等于碰撞之后和之前的质心系中的相对动能之比的平方根。

The characters of kinetic energy＇s change of collision of two-bodies are investigated in the center-of-mass system from the viewpoint of energy,and the results show that the coefficient of restitution is equal to the square root of the ratio of the relative kinetic energy after the collision to that one before the collision.Furthermore,the different forms of collisions are classified from this viewpoint.