A graph of force against extension for a spring is a straight line at first and then curves. What does the curved part of the line show?
The extension is directly proportional to the force.
The extension is no longer directly proportional to the force.
The extension of the spring is decreasing.
The force applied to the spring is decreasing.
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.