Tue October 25, 2011 By:

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Tue October 25, 2011

Recoil of Gun

Let 'M' be the mass of the gun and m that of the bullet. Before firing both are at rest. After firing let 'V' be the velocity of the gun and 'v' that of the bullet. By law of conservation of linear momentum,

initial momentum of gun and bullet = final momentum of gun and bullet.

The initial momentum of the gun and the bullet is equal to zero since they are initially at rest.

Final momentum after firing = MV + mv = 0

[The negative sign indicates that the gun is recoiling]

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