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June 2018 p42 q3
3630
The three coplanar forces shown in the diagram have magnitudes 3 N, 2 N, and \(P\) N. Given that the three forces are in equilibrium, find the values of \(\theta\) and \(P\).
The diagram shows forces of 3 N at an angle of 60° to the horizontal, 2 N at an angle of \(\theta\) to the horizontal, and \(P\) N vertically downward.
Solution
To solve for \(\theta\) and \(P\), we resolve the forces horizontally and vertically, using the fact that the forces are in equilibrium.