A-LevelPhysicsWork, energy and power9702/12 · May/June 2017 · Q171 Mark

A railway engine accelerates a train of total mass 1200 tonnes (1 tonne = 1000 kg) from rest to a speed of 75 ms⁻¹. How much useful work must be done on the train to reach this speed?

A3.4 x 10⁶ J

B6.8 x 10⁶ J

C3.4 x 10⁹ J

D6.8 x 10⁹ J

✓ Correct answer

C: 3.4 x 10⁹ J

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Topic: Work, energy and power, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, May/June 2017 Paper 1 Variant 2, question 17.

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