A force of 12 N produces an extension of 0.30 m in a spring. What is the spring constant of the spring?
0.025 N/m0.025\ \text{N/m}0.025 N/m
3.6 N/m3.6\ \text{N/m}3.6 N/m
12 N/m12\ \text{N/m}12 N/m
40 N/m40\ \text{N/m}40 N/m
106 exam-style questions on AQA GCSE Physics 5.3 Forces and elasticity, covering 5.3 Forces and elasticity. Each one has a worked solution and a mark scheme showing where the marks go.