A particle P P\,P of mass 0.8kg moves under the action of a force F F\,F N. The acceleration of P P\,P is (−3i+4j)(-3\mathbf{i} + 4\mathbf{j})(−3i+4j).
Find the magnitude of FFF.
182 exam-style questions on Edexcel A Level Maths Forces and Motion, covering 10.1 Force Diagrams, 10.2 Forces as Vectors, 10.3 Forces and Acceleration, 10.4 Motion in 2 Dimensions, 10.5 Connected Particles, and 10.6 Pulleys. Each one has a worked solution and a mark scheme showing where the marks go.