A-LevelPhysicsWork, energy and power9702/12 · Oct/Nov 2015 · Q171 Mark

In which situation is no work done?

AThe air in a bicycle tyre is released because of a puncture.

Bball is dropped and falls to the ground.

Cbox moves at constant speed across a smooth horizontal surface.

Dcrane lifts a steel girder at constant speed.

✓ Correct answer

C: box moves at constant speed across a smooth horizontal surface.

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Topic: Work, energy and power, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, Oct/Nov 2015 Paper 1 Variant 2, question 17.

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