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]
01.36: A mass m is attacheq.7xx shga(ke6 *xduo m4jn3;)z;1,qi 0lchc d43m+hqkqq w qd to a spring with a spring constant k. If the mass is set into simple harmonic motion by a displacement d from its equilibrium positioh0il qqh,qwqck3;m 4c z q+d)1n, what would be the speed,v, of the mass when it returns to equilibrium position?
A. $v=\sqrt{\frac{kd}{m}}$
B. $v^{2}=\frac{kd}{m}$
C. $v=\frac{kd}{mg}$
D. $v^{2}=\frac{mgd}{k}$
E. $v=\sqrt{\frac{k}{m}}d$
参考答案: E
本题详细解析:
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