A-LevelPhysicsWork, energy and power9702/12 · Feb/Mar 2017 · Q191 Mark

A car of mass 1400 kg is travelling on a straight, horizontal road at a constant speed of 25 m s⁻¹. The output power from the car's engine is 30 kW. The car then travels up a slope at 2° to the horizontal, maintaining the same constant speed. [Figure showing a car on a horizontal road and then on a slope of 2°, with mass 1400 kg and speed 25 m s⁻¹] What is the output power of the car's engine when travelling up the slope?

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A12 kW

B31 kW

C42 kW

D65 kW

✓ Correct answer

C: 42 kW

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Topic: Work, energy and power, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, Feb/Mar 2017 Paper 1 Variant 2, question 19.

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