The table shows results for two springs. Each spring has zero extension when unloaded.
| Force in N\mathrm{N}N | Extension of P in mm\mathrm{mm}mm | Extension of Q in mm\mathrm{mm}mm |
|---|---|---|
| 1.0 | 5 | 4 |
| 2.0 | 10 | 9 |
| 3.0 | 15 | 15 |
Both springs return to their original lengths after unloading. Which describes their behaviour over the measured range?
P is non-linear and inelastic; Q is linear and elastic.
P is linear and elastic; Q is non-linear and elastic.
P is non-linear and elastic; Q is linear and elastic.
P is linear and elastic; Q is non-linear and inelastic.
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.