(i)[2]
Find the work done by the weightlifter.
(ii)[2]
If the mass takes $1.2\,\text{s}$ to be raised, find the average power developed by the weightlifter.
Mathematics 9709 · AS & A Level · Energy, work and power
Energy, work and power — practice question
A weightlifter carries out an exercise in which he lifts a mass of $200\,\text{kg}$ from rest vertically by a distance of $0.7\,\text{m}$ and then keeps it at that level.
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This 4-mark question has a full step-by-step worked solution and mark scheme. One marking point: “By using $WD = mg \times h$, for example $200g \times 0.7$” …
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