A spring is used to return a laboratory balance arm to its starting position. The spring has an unstretched length of 0.180 m and a spring constant of 250 N/m. It is stretched first to a length of 0.220 m and then to a length of 0.260 m.
Calculate the additional energy transferred to the spring as it is stretched from 0.220 m to 0.260 m. Use E=12kx2\displaystyle E=\frac{1}{2}kx^2E=21kx2.
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.