在程守洙、江之永等同志主编的《普通物理学》第一册第146页上,有如下一道例题: 一绳跨过一定滑轮,两端分别拴有质量为m和M的物体(如图所示).M大于m,M静止在地面上.当m自由下落h距离后,绳子才被拉紧,求绳子刚被拉紧时,两物体的速度及M能上升的最大的高度. 该书对这道题的求解作如下的概述 An example is given on page 146 of the first volume of “General Physics”, edited by Cheng Shou-zu and Jiang Zhiyong, and other comrades. A rope crosses over a certain pulley and ends are respectively connected with objects of mass m and M ) .M is greater than m, M still on the ground.When m free fall h distance, the rope was tightened, and asked the rope just been tightened, the speed of the two objects and M can rise the maximum height. The book gives a brief overview of the solution to this problem