A student investigates how the extension of an alloy wire changes as a pulling force is applied. Their results are shown in the table:
| Force (N) | Extension (mm) |
|---|---|
| 0.0 | 0.0 |
| 2.0 | 1.5 |
| 4.0 | 3.0 |
| 6.0 | 4.5 |
| 8.0 | 5.5 |
| 10.0 | 6.2 |
The student writes this conclusion:
"The extension of the wire is directly proportional to the force applied across the entire range of forces tested."
Comment on the student's conclusion. Use data from the table to support your answer.
23 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.