物体受力分析是研究质点动力学问题的关键。

Force analysis is a key problem in particle dynamics.

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物体受力分析是研究质点动力学问题的关键。本文结合剖析六个例题，给出两条检查和判断物体受力分析正确与否的规则。

Force analysis is a key problem in particle dynamics. In this paper, Sir Examples are discussed and criteria are given for the correctness of force analysis.

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物体的受力分析，是静力学研究中的重要技能。

Analyzing forces loaded of the object is an important technique in the static mechanics.

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