A spring in a pressure-relief valve is stretched as the valve opens. The spring remains in its linear region and has the same spring constant at positions A and B. The force exerted by the spring at B is 4 times the force at A.
Which pair gives the extension at B compared with the extension at A, and the elastic potential energy stored at B compared with that stored at A?
Extension is 16 times as large; energy is 4 times as large.
Extension is 2 times as large; energy is 4 times as large.
Extension is 4 times as large; energy is 8 times as large.
Extension is 4 times as large; energy is 16 times as large.
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.