A machine pulls cable through a fixed guide. The average frictional force between the cable and the guide is 0.28 kN0.28\ \text{kN}0.28 kN.
During a production run, 20 lengths of cable, each 45 m long, pass through the guide. The temperature of the guide rises.
Calculate the total work done against friction during the production run.
Give your answer in kilojoules.
Name the energy store of the guide that increases as the cable passes through it.
113 exam-style questions on AQA GCSE Physics 5.2 Work done and energy transfer, covering 5.2 Work done and energy transfer. Each one has a worked solution and a mark scheme showing where the marks go.