A student draws a force triangle using 1.0 cm to represent 25 N. The resultant arrow is 6.4 cm long and points 35∘ 35^\circ\,35∘ south of east. What additional force would produce equilibrium?
160 N160\ \mathrm{N}160 N, 35∘35^\circ35∘ south of east
40 N40\ \mathrm{N}40 N, 35∘35^\circ35∘ north of west
160 N160\ \mathrm{N}160 N, 35∘35^\circ35∘ north of west
40 N40\ \mathrm{N}40 N, 35∘35^\circ35∘ south of east
93 exam-style questions on Edexcel GCSE Physics 9.1 Forces and vectors, covering 9.1.1 Interactions and types of force, 9.1.2 Vector and scalar quantities, and 9.1.3 Vector diagrams and free body diagrams. Each one has a worked solution and a mark scheme showing where the marks go.