A-LevelPhysicsWork, energy and power9702/12 · May/June 2010 · Q151 Mark

A constant force F, acting on a car of mass m, moves the car up the slope through a distance s at constant velocity v. The angle of the slope to the horizontal is α. [Figure 15.1] Which expression gives the efficiency of the process?

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Amgs sinα / Fv

Bmv / Fs

Cmv² / 2Fs

Dmgs sinα / F

✓ Correct answer

D: mgs sinα / F

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Topic: Work, energy and power, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, May/June 2010 Paper 1 Variant 2, question 15.

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