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Using the fact that the three forces are in equilibrium, determine $F$ and $\alpha$.
Mathematics 9709 · AS & A Level · Forces and equilibrium
Forces and equilibrium — practice question
Three coplanar forces with magnitudes $20\,\text{N}$, $100\,\text{N}$ and $F\,\text{N}$ act at a point. Their directions are indicated in the diagram.