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Physics (AS & A Level) · May / June 2019 · Paper 12 · Question 19

9702Energy conservation

A train on a mountain railway is carrying 200 people of average mass 70 kg up a slope at an angle of 30° to the horizontal and at a speed of 6.0 m s–1. The train itself has a mass of 80 000 kg. The percentage of the power from the engine which is used to raise the passengers and the train is 40%. What is the power of the engine?

  1. A1.1 MW
  2. B2.8 MW
  3. C6.9 MW
  4. D14 MW

As printed in the paper

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Correct answer: C. 6.9 MW

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