问题:对于如图所示的两种情况,若都在A处剪断细绳,在剪断瞬间,关于甲、乙两球的受力情况,下面说法正确的是A.甲、乙两球都只受重力作用B.甲球只受重力作用C.乙球只受重力作用D.以上说法都不对对于这道题学生会在A,C选项中存在争议,我们知道对于弹簧是弹性绳对物体的力不会发生突变,而细绳是刚性绳只要发生微小形变就会产生很大弹力,发生变化的时间可以忽略不 Question: As shown in the two cases, if both cut the string at A, at the moment of snipping, on the A, B two ball force situation, the following statement is correct A. A, B both ball only Subject to gravity B. ball only by gravity C. ball only by gravity D. above is not right for this problem students will be in the A, C options are controversial, we know that the spring is elastic rope on the object force No mutation occurs, and the string is a rigid rope as long as the occurrence of minor deformation will have a great stretch, the time of change can be ignored