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如图1.在摩擦不计的水平面上停放着两辆小车A和B,在两车之间系有一根不可伸长的细绳.给A车一个向右的水平初速.A就沿水平面向右接近匀速地运动,在两车间的绳子被拉直后.A、B两车的速度究竟多大?现时普遍认为,在A、B两车间的绳子被拉直后,两车将以相同的速度一起沿水平面向右运动,其速度大小用“合二为一”的完全非弹性碰撞过程中系统动量守恒来求得,对于这类问题的处理方法似乎已属于公认,但这样的处理方法与客观实际情况是不相符合的.
As shown in Figure 1. Two cars A and B are parked on a level with no friction, and an inextensible string is attached between the two cars. Give the A car a right horizontal muzzle velocity. A faces right along the horizontal plane. Near the uniform movement, after the ropes in the two workshops have been straightened, how much are the speeds of the two cars A and B? Now it is generally believed that after the ropes in the two workshops A and B are straightened, the two cars will be together at the same speed. Movement along the horizontal surface to the right, the speed of which is obtained by the conservation of momentum of the system during the complete inelastic collision process of “combining two into one”, seems to have been recognized as a method of handling such problems, but such processing methods and objective reality The situation is inconsistent.