(i)[2]
Find the work done by the man in moving the wheelbarrow.
(ii)[3]
Find the speed reached by the wheelbarrow after $12\,\text{m}$.
Mathematics 9709 · AS & A Level · Energy, work and power
Energy, work and power — practice question
A man propels a wheelbarrow of mass $25\,\text{kg}$ over a level road using a constant force of magnitude $35\,\text{N}$ applied at $20^\circ$ below the horizontal. A steady resistive force of $15\,\text{N}$ acts against the motion. Starting from rest, the wheelbarrow travels $12\,\text{m}$.
Worked solution & mark scheme
This 5-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Uses work done formula $WD = Fd\cos\theta$ and substitutes $35\cos20 \times 12$” …
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