本题目来源于试卷: Circular Motion，类别为 美国物理杯赛(Physics Bowl)
[单选题]
12.22: A girl swings a 4ptg kf0d* l-e;i4c:gw.0 kg1grnlyu8u 4diulms /(ep7 * :y mass with a constant speed of 3.24 m/s in a verticall7 8e prn d(uuusl :*y4y1igm/ly-oriented circle of radius 0.75 m. What is the net force acting on the mass when it is at the lowest point of the circle?
A. 96 N
B. 56 N
C. 40 N
D. 16 N
E. 0 N
参考答案: B
本题详细解析:
暂无
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