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A stone when thrown on a glass window sm...

A stone when thrown on a glass window smashes the window pane to pieces , but a bullet from the gun passes through making a clean hole. Why ?

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This is because velocity of bullet from the gun is very large . It takes very little time to cross the windown pane . Particles of window pane near the hole have to little time to share the motion of the bullet . Reverse is the case when stone is thrown with hand .
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