Question

Rocket works on the principle of conservation of

• A. Mass
• B. Energy
• C. Momentum
• D. Velocity

Answer 1

The correct option is C

Momentum

The explanation of the correct option

C: Momentum

1. The rocket acquires its large velocity from the hot gases coming out of it.
2. The hot gas goes out of the rocket with a large velocity, which provides the rocket with large momentum in the opposite direction.
3. The rocket thus moves upwards. Here the conservation of momentum takes place.

The explanation of incorrect option(s)

A: Mass

1. We know that mass is neither created nor destroyed in this case mass is not conserved.

B: Energy

1. We know that energy is neither created nor destroyed we can change only in one form to another form of energy in this case energy is not conserved.

Hence, the rocket works on the principle of conservation of momentum. Hence option (c) is correct.