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29-01-2018
Physics

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When a gun is fired at the shooting range, the gun recoils (moves backward). Explain this using the law of conservation of momentum

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zhaotianyu369 zhaotianyu369

29-01-2018

The total momentum is unchanged according to the law of conservation of momentum. When the gun is fired, the bullet gains a high velocity forward (positive velocity), and that velocity multiplied by its mass is the momentum the bullet gains. Therefore, the gun must gain a momentum backwards to cancel out that momentum forward, so the gun recoils back with a negative velocity.

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