Resultant of coplanar forces

A question is this type if and only if it asks you to find the magnitude and/or direction of the resultant of two or more coplanar forces acting at a point, where the system is NOT in equilibrium.

52 questions · Moderate -0.6

3.03p Resultant forces: using vectors
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WJEC Unit 4 2019 June Q7
6 marks Moderate -0.8
Three coplanar horizontal forces of magnitude \(21\) N, \(11\) N and \(8\) N act on a particle \(P\) in the directions shown in the diagram. \includegraphics{figure_7}
  1. Given that \(\tan\alpha = \frac{3}{4}\), calculate the magnitude of the resultant force. [5]
  2. Explain why the forces cannot be in equilibrium whatever the value of \(\alpha\). [1]
OCR H240/03 2017 Specimen Q9
4 marks Moderate -0.8
Two forces, of magnitudes 2 N and 5 N, act on a particle in the directions shown in the diagram below. \includegraphics{figure_9}
  1. Calculate the magnitude of the resultant force on the particle. [3]
  2. Calculate the angle between this resultant force and the force of magnitude 5 N. [1]