A manufacturer tests two polymer cords, U and V. Both cords have zero extension before the test.
| Force in N\mathrm{N}N | Extension of U in mm\mathrm{mm}mm | Extension of V in mm\mathrm{mm}mm |
|---|---|---|
| 4 | 10 | 9 |
| 8 | 23 | 20 |
| 12 | 40 | 34 |
After the force is removed, cord U has zero extension and cord V has an extension of 5 mm.
Which conclusion is supported by these results?
Both cords have non-linear force-extension relationships; U behaves elastically and V undergoes inelastic distortion.
Both cords have non-linear force-extension relationships; U undergoes inelastic distortion and V behaves elastically.
Both cords have linear force-extension relationships; U behaves elastically and V undergoes inelastic distortion.
Cord U has a linear force-extension relationship and cord V has a non-linear relationship; both undergo inelastic distortion.
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.