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 mas 8ovw y- dxn5*:92acpgsxy-m h arqi- 8s M on a horizontal su i 57fl30v3q(7nmmhfi9. w7xi / rfjtihl6hwf rface is connected to the end of a massless spring of spring constant k. The block is pulled a distance x from equ tq7mih6wilf(m3fi /j5wi. l77xvf9h f0 h n3rilibrium 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-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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