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Calculate the size of the resultant from the three forces. Calculate also the angle between the resultant and the $x$-direction.
Mathematics 9709 · AS & A Level · Forces and equilibrium
Forces and equilibrium — practice question
Three coplanar forces with magnitudes $250 \text{ N}$, $160 \text{ N}$ and $370 \text{ N}$ are applied at a point $O$ in the directions indicated in the diagram, with angle $\alpha$ defined by $\sin \alpha = 0.28$ and $\cos \alpha = 0.96$.
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This 7-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Breaks the forces into components to obtain $X = 160 + 250\cos\alpha$” …
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