Which row gives the unit of the spring constant of a spring?
joules per metre, J/m\text{J/m}J/m
newtons per metre, N/m\text{N/m}N/m
newtons per kilogram, N/kg\text{N/kg}N/kg
joules per kilogram, J/kg\text{J/kg}J/kg
40 exam-style questions on AQA GCSE Physics 1.1 Energy changes in a system, and the ways energy is stored before and after such changes, covering 1.1.1 Energy stores and systems, 1.1.2 Changes in energy, 1.1.3 Energy changes in systems, and 1.1.4 Power. Each one has a worked solution and a mark scheme showing where the marks go.