Multiple choice

The working of a rocket is based on _____.

  1. law of conservation of energy

  2. law of conservation of momentum

  3. law of conservation of mass

  4. law of gravitation
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Rocket propulsion works on Newton's third law and conservation of momentum. As rocket engine expels gases backward at high velocity, the rocket gains equal forward momentum. This momentum exchange allows rockets to work even in vacuum where there's nothing to push against.

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