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Determine the value of $\alpha$.
Mathematics 9709 · AS & A Level · Energy, work and power
Energy, work and power — practice question
A block is dragged across a level floor for $50\,\text{m}$ by a rope making an angle of $\alpha^\circ$ with the floor. The rope tension is $180\,\text{N}$, and the work done by the tension is $8200\,\text{J}$.
Worked solution & mark scheme
This 3-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Apply the work done against resistance formula $WD = Fd\cos\alpha$, giving $8200 = 180 \times 50 \cos\alpha$” …
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