本题目来源于试卷: Circular Motion，类别为 美国物理杯赛(Physics Bowl)
[单选题]
96.24: A 2.0-kg ball is attached to j8gaqk2 le0y r:2k auy c7r.;ja 0.80 m string and whirled in a h , 2mlqi :p:tbq x77clcorizontal circle at a constant speed of 6.0 m/s. See figure to the :qlmb cx7 tpci2,:q7lright. The work done on the ball during each revolution is:
A. $450J$
B. $90J$
C. $72J$
D. $16J$
E. $zero$
参考答案: E
本题详细解析:
暂无
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