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Physics Medium FPSC PPSC NTS Uploaded: 13 Jul 2026

Which law explains why rockets can propel themselves in space?

  • A Newton's First Law
  • B Newton's Third Law
  • C Bernoulli's Principle
  • D Newton's Second Law
Correct Answer: Option B — Newton's Third Law
Explanation:
Rockets work on Newton's Third Law as gases expelled backward at high speed produce an equal and opposite forward thrust allowing propulsion even in the vacuum of space.
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