An engineer measures the length of a steel spring as different loads are suspended from it.
The table below shows the results of the measurements:
| Weight / N\text{N}N | Length / mm\text{mm}mm |
|---|---|
| 0 | 340 |
| 2.0 | 348 |
| 4.0 | 356 |
| 6.0 | 365 |
| 8.0 | 373 |
| 10.0 | 380 |
What is the extension of the spring when the weight hung from it is 6.0 N?
9 mm9 \text{ mm}9 mm
17 mm17 \text{ mm}17 mm
25 mm25 \text{ mm}25 mm
365 mm365 \text{ mm}365 mm
245 exam-style questions on CIE IGCSE Physics 1.5 Forces, covering 1.5.1a Forces, resultant force and motion, 1.5.1b Load–extension graphs and the spring constant, 1.5.1c Friction and drag, 1.5.1d Force, mass and acceleration, 1.5.1e Motion in a circular path, 1.5.2a Moment of a force, 1.5.2b Principle of moments and equilibrium, and 1.5.3 Centre of gravity and stability. Each one has a worked solution and a mark scheme showing where the marks go.