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 a hor 5vfd-af9rw74m b55aoqq gnuaqi 8: .jr ):xbaizontal fric esbia16+kunw5s w47 lp.b lw:tionless surface, as shown. A block start iwbsus:n5l.w6ae l wb4k+p71 s from rest and slides down the inclined surface of the wedge, which 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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