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COM in Collision and Explosion

A gun recoils...

Question

A gun recoils backward after firing a bullet

A

To follow the law of inertia

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B

To conserve momentum

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C

To conserve mass

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D

The statement is wrong

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Solution

The correct option is B To conserve momentum
Because there is no external force on the gun-bullet system, it would conserve momentum. If the bullet gain momentum in one direction, the gun would gain momentum in the opposite direction.

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Similar questions

Q. Why gun recoils when bullet is been fired?
Is it because of conservation of momentum or this happens that's why it called conservation of momentum?

Explain how the law of conservation of momentum can be used to explain (i) recoil of a gun (ii) motion of a rocket.

Q. Assertion (A) : When a bullet is fired from a gun, the momentum of the bullet is conserved.
Reason (R) : Law of conservation of momentum holds good for any collision.

Q. Assertion :A gun of mass

M

fires a bullet of mass

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, the ratio of recoil energy of gun to the K.E. of bullet is

\frac{m}{M}

. Reason: In firing, momentum is conserved. Hence, kinetic energy is in the inverse ratio of masses.

Q. Assertion :In case of bullet fired from gun, the ratio of kinetic energy of gun and bullet is equal to ratio of mass of bullet and gun. Reason: In firing, momentum is conserved.

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