本题目来源于试卷: 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 a horizo nf,vdp-yvv fe08f l ;,g 5hsodb :z8:ont io74vhfam /2 sal 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 surface and the block would prevent the block from returning to equilibrium with non-zer i s7/ 4a2ovfhmo 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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