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Rocket propulsion is based on Newton's third law together with which other principle?
AConservation of linear momentum
BPrinciple of moments
CLaw of inertia of rest
DSnell's law of refraction
Answer & Solution
Correct answer: A. Conservation of linear momentum
1. Burning fuel ejects hot gas downward at high speed, giving it large momentum.
2. To conserve total momentum with no net external force, the rocket gains equal forward momentum.
3. This combines the conservation of linear momentum with Newton's third law.
_Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit 1 "Laws of Motion", p.15_
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