A technician tests four springs, A, B, C and D, that could be used in a handheld luggage scale. The technician applies known forces to each spring and measures its extension.
| Force in N | Extension of A in mm | Extension of B in mm | Extension of C in mm | Extension of D in mm |
|---|---|---|---|---|
| 1.0 | 5.0 | 5.0 | 8.0 | 5.0 |
| 2.0 | 10.0 | 10.0 | 13.0 | 10.0 |
| 3.0 | 15.0 | 16.0 | 18.0 | 20.0 |
| 4.0 | 20.0 | 23.0 | 23.0 | 40.0 |
For which spring is the extension directly proportional to the applied force?
Spring A
Spring D
Spring C
Spring B
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.