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  • Two identical bullets are fired one by a light rifle and another by a heavy rifle with the same force. Which rifle will hurt the shoulder more and why?

Two identical bullets are fired one by a light rifle and another by a heavy rifle with the same force. Which rifle will hurt the shoulder more and why?

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Sol. In both cases: the bullet is fired with the same force, therefore the momentum of the bullet will be the same in both cases. By conservation of momentum, we can say the momentum of both the guns would be the same. As momentum is the same for both the guns, the velocity of the lighter gun will be more. Therefore, a lighter gun will strike the shoulder in lesser time.

We know, force is the change in momentum in unit time. Hence, we can say that the lighter gun will apply more force: as the same momentum is changed in lesser time.

Posted by

Gurleen Kaur

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