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Physics (AS & A Level) · May / June 2025 · Paper 12 · Question 9

9702Momentum and Newton’s laws of motion

A rocket engine ejects 90 kg of exhaust gas per second at a velocity of 190 m s–1 relative to the rocket. What is the force acting on the rocket due to the ejected gas?

  1. A2.1 kN
  2. B17 kN
  3. C18 kN
  4. D162 kN

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Correct answer: B. 17 kN

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