Power
2 marks · EasyA boy pushes a trolley with a force of 50 N for a distance of 4 m. Calculate the work done by the boy on the trolley.
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200 J (±1)
Also accept: 200
Common mistakes: Adding instead of multiplying; Wrong units
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Marking points
M1 · 1 mark · Correctly substitutes work done = F × d (50 × 4)
A1 · 1 mark · Gives final answer: 200 J
Worked solution
Work done = force × distance = 50 N × 4 m = 200 J