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2015-08-06T21:28:46+05:30
After collision of two objects the sum of momenta of two objects remains same.
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  • Brainly User
2015-08-06T21:39:51+05:30
When we fire a bullet there willbe some force exerted by us and the the speed of the bullet makes us to move the gun backwards this is called law of conservation of momentum
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