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]
94.05: Amass m; attached t z2b x/r/mpv2 jo.:lygo a horizontal x5y/j5s)1 ma(x3rxnlnn zrx h7x5d9qmassless spring with spring constant k; is set into simple harmonic motion. Its maximum displ n r59a)5mnyq xxd(/3l1xjh 5rxszn7 xacement from its equilibrium position is A. What is the mass’s speed as it passes through its equilibrium position?

A. 0
B. $A\frac{\sqrt{k}}{m}$
C. $A\sqrt{\frac{m}{k}}$
D. $\frac{1}{A}\sqrt{\frac{k}{m}}$
E. $\frac{1}{A}\sqrt{\frac{m}{k}}$
参考答案: B
本题详细解析:
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