A student investigates how the length of a spring changes when different forces are applied to it.
The Table shows her results.
Table
| Force in N\text{N}N | Length of spring in cm\text{cm}cm |
|---|---|
| 0 | 15.0 |
| 1.0 | 17.5 |
| 2.0 | 20.0 |
| 3.0 | 22.5 |
| 4.0 | 25.0 |
| 5.0 | 28.5 |
| 6.0 | 33.0 |
Calculate the extension of the spring when the force is 3.0 N.
Describe the relationship between the force and the extension for forces up to 4.0 N.
Describe how the relationship changes for forces above 4.0 N.
Use the equation: force=spring constant×extension\text{force} = \text{spring constant} \times \text{extension}force=spring constant×extension
Calculate the spring constant of the spring in N/m\text{N/m}N/m.
46 exam-style questions on OCR GCSE Physics 2.3 Forces in action, covering 2.3.1 Stretching, bending and compressing, 2.3.2 Elastic and plastic deformation, 2.3.3 Force and extension of a spring, 2.3.4 Linear and non-linear force-extension behaviour, 2.3.5 The spring constant, 2.3.6 Work done in stretching, 2.3.7 Gravitational fields, 2.3.8 Weight and gravitational field strength, 2.3.9 Acceleration in free fall, 2.3.10 Relating force, mass and gravitational field strength, 2.3.11 Forces causing rotation, 2.3.12 The moment of a force, 2.3.13 Levers and gears, 2.3.14 Pressure in fluids, and 2.3.15 Pressure, force and contact area. Each one has a worked solution and a mark scheme showing where the marks go.