A package slides across a horizontal conveyor belt. At one instant, the package moves to the right at 1.5 m/s and the belt surface beneath it moves to the right at 2.0 m/s.
Explain the direction of the frictional force exerted by the belt on the package, and state whether this is a contact or non-contact force.
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.