结论两物体发生弹性碰撞,碰撞前后,两物体的相对速度大小不变,方向相反. 证明质量分别为m1和m2的两个物体,碰前的速度分别是v10,v20,碰撞过程中没有机械能损失,碰撞分离后的速度分别是v1,v2.根据动量守恒定律和机械能守恒定律有 Conclusion The elastic collision occurs between the two objects. Before and after the collision, the relative speeds of the two objects are the same and the directions are reversed. Two masses whose masses are m1 and m2 respectively are proved. The velocity before collision is v10 and v20, respectively. There is no mechanical energy loss during the collision. The velocity after collision separation is v1, v2. According to the law of conservation of momentum and the law of conservation of mechanical energy