For any machine whose input force and output force are known, its mechanicaladvantage and be calculated.

如何机器，若已知其输入力和输出力，则可以求出其机械效益。

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For any machine whose input force and output force are known, its advantage can be calculated.

任何机器，若已知其输入力和输出力，则可求出其机械效益。

youdao

For any machine whose input force and output force are known, its mechanical advantage can be calculated.

如果机器的输入和输出功率已知，他的机械效率就可以计算。

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