本题目来源于试卷: Centre of mass system，类别为 美国物理杯赛(Physics Bowl)
[单选题]
07.20: A large wedge rests on kt(a ,8ce8 .l dzfz h y*-zecme1;8vlp a h s2t m-zc uj0zk e7n90rorizontal frictionless surface, as shown. A block starts from rest and slides down the inclined surface of the wedge, w su jzk r-c702n0mtze9hich is rough. During the motion of the block, the center of mass of the block and wedge system
A. does not move.
B. moves vertically with increasing speed.
C. moves horizontally with constant speed.
D. moves horizontally with increasing speed.
E. moves both horizontally and vertically.
参考答案: B
本题详细解析:
暂无
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