An elastic cord is pulled by a testing machine. Its force–extension graph is a straight line through the origin at first, but the line curves at larger forces. Which term describes the relationship between force and extension in the curved section?
linear behaviour
inelastic deformation
elastic deformation
non-linear behaviour
106 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.