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]
01.36: A mass m is attached to a spring with a so1u6e , rn+qpzpring constanrcw;:1qqe,d -ix g l7ot k. If the mass is set into simple harmonic motion by a dg :,q1;cqeolxi r -w7displacement d from its equilibrium position, 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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