A swimmer is in contact with the wall and the water of a swimming pool. To start moving, the swimmer pushes on the wall with a force of 180 N directed backwards. Which force is paired with the force the swimmer exerts on the wall?
A 180 N180\ \text{N}180 N force directed backwards on the swimmer, exerted by the wall.
A 180 N180\ \text{N}180 N force directed forwards on the wall, exerted by the swimmer.
A 180 N180\ \text{N}180 N force directed forwards on the swimmer, exerted by the wall.
A 180 N180\ \text{N}180 N force directed forwards on the swimmer, exerted by the water.
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.