In an investigation of force and extension, why should a student remove the load after each reading and check the length of the spring?
to allow the spring to cool down between the readings
to check that the spring has not been inelastically deformed
to make sure that the spring constant increases each time
to reduce the weight of the spring before the next reading
40 exam-style questions on AQA GCSE Physics 5.3 Forces and elasticity, covering 5.3 Forces and elasticity. Each one has a worked solution and a mark scheme showing where the marks go.