This is the moment of momentum theorem of a particle.

这就是质点对固定点的动量矩定理.

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The momentum theorem applied to an impact. Theorem of impulse.

用于碰撞过程的动量定理——冲量定理.

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So, the momentum and the momentum theorem become the main tools for investigating impact phenomena.

因此, 动量定理和动量矩定理就成了研究碰撞问题的主要工具.

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