A heavy trunk of mass 50 kg is at rest on a rough stone floor. The coefficient of friction between the trunk and the floor is 0.3. A person exerts a pulling force of F F\,F N at an angle of 40∘ 40^\circ\,40∘ to the horizontal. The trunk is in limiting equilibrium.
Find the value of FFF.
12 exam-style questions on WJEC A Level Maths 4.9.1 Forces and Newton's laws (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.