問題詳情

2. A pendulum of length L has its motion interrupted by a peg vertically beneath the support at a distance y below support, see Fig. 1. The bob is released when the string is horizontal.What is the minimum value of y for the bob to swing in a complete circle?


(A) L/2 ；
(B) 2L/3；
(C) 3L/4 ；
(D) 3LI5；
(E) None.

參考答案

答案：D
難度：計算中-1
書單：沒有書單，新增