A student hangs a spring from a clamp. She then hangs some masses on the bottom of the spring. The spring stretches.
Explain why the spring would not stretch if only the weight of the masses acted on it.
When the masses are removed, the spring goes back to its original length.
Which word describes this type of change in shape?
Choose your answer from the list.
elastic linear plastic proportional
The student adds many more masses. When she removes all the masses, the spring is now longer than its original length.
Name this type of deformation.
Another spring has a spring constant of 25 N/m. It is stretched so that its extension is 0.080 m.
Use the equation: force=spring constant×extension\text{force} = \text{spring constant} \times \text{extension}force=spring constant×extension
Calculate the force on the spring.
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.