A-LevelPhysicsWork, energy and power9702/12 · Feb/Mar 2018 · Q141 Mark

A car of mass 1100 kg is travelling at a constant speed of 15 ms⁻¹ up a slope inclined at 10° to the horizontal. The combined frictional forces acting on the car are directed down the slope and are equal to W/5, where W is the weight of the car. [Figure 14.1] What is the useful output power of the car's engine?

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A28 kW

B32 kW

C60 kW

D190 kW

✓ Correct answer

C: 60 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 2018 Paper 1 Variant 2, question 14.

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