A wooden block slides to the right across a horizontal rough surface. Which statement describes the frictional force exerted by the surface on the block?
It is a contact force acting to the left.
It is a contact force acting to the right.
It is a non-contact force acting to the left.
It is a non-contact force acting to the right.
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.