A-LevelPhysicsWork, energy and power9702/12 · Oct/Nov 2016 · Q201 Mark

A car travels at a constant speed of 25 m s⁻¹ up a slope. The wheels driven by the engine exert a forward force of 3000 N. There is a drag force due to air resistance and friction of 2100 N. The weight of the car has a component down the slope of 900 N. What is the rate at which thermal energy is dissipated?

Azero

B2.3 × 10⁴ W

C5.3 × 10⁴ W

D7.5 × 10⁴ W

✓ Correct answer

C: 5.3 × 10⁴ W

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Topic: Work, energy and power, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, Oct/Nov 2016 Paper 1 Variant 2, question 20.

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