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一小球和竖直的杆想撞动量守恒吗

更新时间: 2020-10-07 00:00:00     

这个问题是无法回答的。首先要清楚,动量是矢量,而且只有在不受力或者受合外力为0的情况下才守恒,如果小球和竖杆符合上面的条件,那么动量就守恒,如果只在某个方向上符合上面的条件,那么只在这个方向上动量守恒。

关键词: 小球 动量 守恒

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