A spring has a spring constant of 400 N/m.
The energy stored in the spring is 1.8 J.
Use the equation: energy transferred in stretching=12×spring constant×(extension)2\text{energy transferred in stretching} = \dfrac{1}{2} \times \text{spring constant} \times (\text{extension})^2energy transferred in stretching=21×spring constant×(extension)2
What is the extension of the spring?
0.0045 m0.0045\ \text{m}0.0045 m
0.0090 m0.0090\ \text{m}0.0090 m
0.095 m0.095\ \text{m}0.095 m
0.067 m0.067\ \text{m}0.067 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.