２０００年安徽省春季高考物理最后一题，是以两个小球相对运动为题型的纯力学题，它与以往试题所不同的是已知条件少（仅知一个球初速度和后一个阶段的时间）看起来难以求解，这正是该题的新颖之处． ［题目］相隔一定距离的Ａ、Ｂ两球，质量相等，假定它们之间存在恒定的斥力 The last question in the physical examination of the spring college entrance examination in Anhui Province in 2000 was a pure mechanics problem with the two balls as their relative motion. It differs from the previous ones in that the known conditions are small (only one ball is known for the initial speed and the latter phase. Time seems to be difficult to solve, this is the novelty of the problem. [Topic] Two balls A and B separated by a certain distance, equal in mass, assuming a constant repulsion between them