O-LevelPhysicsEnergy & Work5054/11 · Oct/Nov 2012 · Q141 Mark

A builder lifts eight slabs from the ground on to the back of a lorry 1.5m high. The total time taken is 48 s and each slab weighs 20 Ν. How much useful power does the builder produce?

A5 W

B40 W

C240 W

D320 W

✓ Correct answer

A: 5 W

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Topic: Energy & Work, O-Level Physics (syllabus 5054). Multiple choice, 1 mark.
Source: O-Level Physics, Oct/Nov 2012 Paper 1 Variant 1, question 14.

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