Space Time & Motion A.3 Work Energy and Power (id: 19b8db713)

本题目来源于试卷: Space Time & Motion A.3 Work Energy and Power，类别为 IB物理学

[单选题]
A spring of spring constant $200\,N\;s^{-1}$ is compressed by $6.0\,cm$.

At the point where the box has moved $4.0\,cm$, how much work has been done by the spring on the box?

A. $0.16J$
B. $0.20J$
C. $0.32J$
D. $0.36J$


参考答案:  C


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