本题目来源于试卷: Basic Concepts，类别为 美国物理杯赛(Physics Bowl)
[单选题]
09.22: A point object is connect-a+allkm 81lx ed to the end of s) s20/9 ovsel tbc(t md+(gfla long string of negligible mass and the system swings as a simple pendulum with period T. What is the period of the pendulum9tos( d sv te+bc lfs/(mgl2)0 if the string is made to have one-quarter of its original length?
A. $4T$
B. $2T$
C. $T$
D. $T/2$
E. $T/4$
参考答案: D
本题详细解析:
暂无
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