An elastic cord is used to secure equipment.
Which change increases the elastic potential energy store of the cord?
Moving it faster without changing its length.
Pulling its ends farther apart so that the cord stretches.
Letting the stretched cord shorten towards its natural length.
Carrying it upstairs without changing its length.
102 exam-style questions on Edexcel GCSE Physics 15.1 Forces and springs, covering 15.1.1 Elastic and inelastic distortion, 15.1.2 The spring constant, 15.1.3 Work done in stretching a spring, and 15.1.4 Linear and non-linear force–extension. Each one has a worked solution and a mark scheme showing where the marks go.