A student measures the length of a spring. They then attach different weights to the spring and measure its length for each weight.
The table shows their results:
| Weight / N\text{N}N | Length / mm\text{mm}mm |
|---|---|
| 0 | 180 |
| 1.0 | 185 |
| 2.0 | 191 |
| 3.0 | 196 |
| 4.0 | 202 |
| 5.0 | 207 |
What is the extension of the spring with a weight of 3.0 N attached to it?
5 mm5\text{ mm}5 mm
16 mm16\text{ mm}16 mm
180 mm180\text{ mm}180 mm
196 mm196\text{ mm}196 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.