Question

The motion of a rocket in upward direction with high speed is based on the principle of conservation of

• A. kinetic energy
• B. mass
• C. angular momentum
• D. linear momentum

Hint:

Rocket motion does not require air; it works even in vacuum due to momentum conservation.

Answer 1

The Correct Option is D

Step 1: Understand rocket propulsion.
A rocket moves upward by ejecting gases downward at high speed.
Step 2: Apply conservation law.
In absence of external forces, total linear momentum of rocket and exhaust gases remains conserved.
Step 3: Explain motion.
Downward momentum of gases produces equal upward momentum of the rocket.
Step 4: Conclusion.
Rocket propulsion is based on conservation of linear momentum.