Two identical bullets are fired,one by a ligh | vedclass

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(A) According to the law of conservation of momentum,the momentum of the bullet is equal to the momentum of the rifle $(p = mv)$.Since the force appli

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Light rifle

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(A) According to the law of conservation of momentum,the momentum of the bullet is equal to the momentum of the rifle $(p = mv)$.Since the force applied is the same,the impulse $(F 	imes t)$ imparted to both rifles is the same,resulting in the same change in momentum.For a light rifle,the mass $(m)$ is smaller,so to achieve the same momentum,the recoil velocity $(v)$ must be significantly higher.For a heavy rifle,the mass $(m)$ is larger,resulting in a lower recoil velocity $(v)$.Since the kinetic energy of recoil $(KE = \frac{1}{2}mv^2)$ is proportional to the square of the velocity,the lighter rifle experiences a higher recoil velocity,which causes a greater impact force on the shoulder. Therefore,the lighter rifle will hurt the shoulder more.

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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