Two students, P and Q, stand facing each other, each on a skateboard. Student P pushes student Q. Both students then move apart.
Explain why student P moves backwards, even though it was student P who pushed.
The two students each hold a magnet so that the two magnets repel each other. The students move apart without the magnets touching. Give the type of force acting between the two magnets.
A student says: 'Two objects must be touching for a force to act between them.' Explain why this student is wrong.
Give one reason why the push between the two students in part (a) is a contact force.
40 exam-style questions on AQA GCSE Physics 5.1 Forces and their interactions, covering 5.1.1 Scalar and vector quantities, 5.1.2 Contact and non-contact forces, 5.1.3 Gravity, and 5.1.4 Resultant forces. Each one has a worked solution and a mark scheme showing where the marks go.