A spring in a weighing device is calibrated. The table shows its length for different forces.
| Force (N) | Length (m) |
|---|---|
| 2.0 | 0.126 |
| 4.0 | 0.152 |
| 6.0 | 0.178 |
The spring remains in its linear region for all forces up to 10 N.
Calculate the spring constant of the spring and the length of the spring when the force is 9.0 N.
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.