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Second Law of Motion

A bullet of m...

Question

A bullet of mass 0.02kg is fired from a gun weighing 7.5 kg .if the initial velocity of the bullet is 200 m/ s ,calculate the speed with which the gun recoils.

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Solution

According to the law of conservation of momentum:
Mass of bullet x Velocity of bullet=Mass of gun x Recoil velocity of gun
0.02 x 200=7.5 x recoil velocity of gun
Recoil velocity of gun=0.02 x 200/7.5=0.53 m/s

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