A hand presses a block against a vertical wall. The block remains at rest and would slide down if the wall were smooth. Which statement gives the directions of the forces exerted by the wall on the block?
Normal contact is horizontal; friction is downwards.
Normal contact is upwards; friction is horizontal.
Normal contact is horizontal; friction is upwards.
Normal contact is downwards; friction is horizontal.
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.