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ZX-E08928C88A2026年8月美国A卷 · 第 17 题
2026年8月美国A卷 · 原库模块 1 · Q17 参考答案
The elastic potential energy E, in newton‑meters, stored in a spring is the product of \( \frac{1}{2} \)the spring constant, in newtons per meter, and the square of the number of meters, x, the spring is stretched from its equilibrium position. If the spring constant for a certain spring is 74 newtons per meter, which equation gives the elastic potential energy, in newton‑meters, stored in this spring in terms of the number of meters the spring is stretched from its equilibrium position?
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