Question

When a bullet is fired from a gun. The gun recoils to:

• A. Conserve mass
• B. Conserve Momentum
• C. Conserve K. E.
• D. none of these

Answer 1

The correct option is B

Conserve Momentum

Explanation of correct option

(B): Conserve Momentum

1. According to Newton’s third law of motion, every action gives an equal and opposite reaction.
2. When a bullet is fired from the gun, it will move a little backward, and the gun recoils to conserve momentum after firing the bullet.

Explanation of incorrect option(s)

(A): Conserve mass: Conservation of mass states that mass neither created nor be destroyed.

(C): Conserve K. E.: Kinetic Energy is conserved during an elastic collision.

Hence when a bullet is fired from a gun. The gun recoils to Conserve Momentum. Hence option (b) is correct.