A-LevelPhysicsDynamics9702/12 · May/June 2025 · Q91 Mark

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

A2.1 kN

B17 kN

C18 kN

D162 kN

✓ Correct answer

B: 17 kN

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