An automatic gate has an extension spring in its closing mechanism. The spring obeys Hooke's law throughout the movement.
| Quantity | Value |
|---|---|
| initial extension of the spring | 12.0 mm |
| final extension of the spring | 36.0 mm |
| force exerted by the spring at the final extension | 90.0 N |
Calculate the energy transferred to the spring as the gate moves from the initial position to the final position.
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.