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撞击

物理学里,假若两个物体相互接触,造成能量动量的改变与传输,则称这两个物体互相碰撞。假若,碰撞的时间很小,而互相作用的力很大,则称为撞击。在这撞击过程中,最初的接触点叫做弹著点。经过弹著点,垂直于两个物体之间的切面,就是撞击线。冲击可以分成对心撞击偏心撞击。假若,两个物体的质心都在撞击线上,则称为对心撞击;其他的冲击都称为偏心撞击。对心撞击又分成两类:当两个物体的速度向量与撞击线在同一条线上时,则称为正向对心撞击;不然,则称为斜向对心撞击

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撞击
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