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2015-08-20T14:00:27+05:30

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according to the law of conservation of momentum,in each and every collosion the total momentum of both the body remains constant........
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provided the external force on them is zero...
2015-08-20T18:17:23+05:30

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Law of conservation of momentum states that if the net force applied on the body is absent then the momentum remains unchanged
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net external force on a system of bodies is zero, then ....