本题目来源于试卷: 2011 美国F=ma物理竞赛 F=ma physics competition，类别为 美国物理杯赛(Physics Bowl)
[单选题]
A vertical mass-spring oscillator is,vuzw btq 8(6p7d mxe9 displacedm t,r6k sn;t 8mkeq .yor;,x)t $2.0 \mathrm{~cm}$ from equilibrium. The $100 \mathrm{~g}$ mass passes through the equilibrium point with a speed of $0.75 \mathrm{~m} / \mathrm{s}$. What is the spring constant of the spring?
A. $90 \mathrm{~N} / \mathrm{m}$
B. $100 \mathrm{~N} / \mathrm{m}$
C. $110 \mathrm{~N} / \mathrm{m}$
D. $140 \mathrm{~N} / \mathrm{m}$
E. $160 \mathrm{~N} / \mathrm{m}$
参考答案: A
本题详细解析:
暂无
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