本题目来源于试卷: 2011 美国F=ma物理竞赛 F=ma physics competition，类别为 美国物理杯赛(Physics Bowl)
[单选题]
A hollow cylinder wit*nufsocf.vi -ra -mlm+hgs 5 e;(wl,, h a very t*(ad wtvulzd p4z6a 800kf.nthin wall (like a toilet paper tube) and a block are placed6tzw 8a.0p0 *n vf(k4 duladzt at rest at the top of a plane with inclination $\theta$ above the horizontal. The cylinder rolls down the plane without slipping and the block slides down the plane; it is found that both objects reach the bottom of the plane simultaneously. What is the coefficient of kinetic friction between the block and the plane?
A. 0
B. $\frac{1}{3} \tan \theta$
C. $\frac{1}{2} \tan \theta$
D. $\frac{2}{3} \tan \theta$
E. $\tan \theta$
参考答案: A
本题详细解析:
暂无
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