本题目来源于试卷: Simple Harmonic Motion: Parameters and Typical Relationship，类别为 美国物理杯赛(Physics Bowl)
[单选题]
08.48: A block of mass M on rqc bjit2s*hq8,/ka2 )ga q 3qa horiz 5kw s7zagn7nt0 ;-bf zcpia.4ontal surface is connected to the end of a massless spring of spring constant k. The block is pulled a distance x from equilibrium and when released from rest, the block moves toward equilibrium. What minimum coefficient of kinetic friction between the su zpz i. 7-a;wactn40s n5g k7bfrface and the block would prevent the block from returning to equilibrium with non-zero speed?
A. $\frac{kx^{2}}{2Mg}$
B. $\frac{kx}{Mg}$
C. $\frac{kx}{2Mg}$
D. $\frac{Mg}{2kx}$
E. $\frac{k}{4Mgx}$
参考答案: C
本题详细解析:
暂无
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