The axle of a playground roundabout turns inside a bearing. After the roundabout has been pushed, it gradually slows because of friction between the axle and the bearing.
What happens to the energy as friction does work?
Energy is transferred from the gravitational potential energy store of the roundabout to the thermal energy stores of the axle and the bearing.
Energy is transferred from the thermal energy stores of the axle and the bearing to the kinetic energy store of the roundabout.
Energy is transferred from the kinetic energy store of the roundabout to its gravitational potential energy store.
Energy is transferred from the kinetic energy store of the roundabout to the thermal energy stores of the axle and the bearing.
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.