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物理教科书/动量守恒
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来自维基教科书，开放的书籍，服务于开放的世界
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物理教科书
动量守恒定律指出在一个给定系统中，如果除了碰撞外没有外力作用于该系统，则其总动量保持恒定
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书：物理教科书
华夏公益教科书
