碰撞后速度大小范围问题的一种图像解法

An Image Solution on the Questions about Velocity Value Range after Collision

一道求解碰撞后速度大小范围问题，有些资料给出的答案有待商榷．本文通过椭圆函数和直线函数图像对此题进行分析解答．

There is an quesiton about the velocity value range of balls after they collide, its answer given by some literature is questionable. In this paper, we analyze and solve this question by using image of elliptic function and linear fun ction.