A battery-powered trolley in a warehouse is designed to carry parcels along a track. A lamp on the trolley is designed to light up the label on each parcel. When the trolley runs, energy is transferred to the kinetic store of the trolley, by light from the lamp, and to the thermal stores of the track and of the trolley's connecting wires.
Which describes the useful and the dissipated energy transfers for the trolley correctly?
Useful: to the kinetic store of the trolley, by light from the lamp and to the thermal store of the track. Dissipated: to the thermal store of the connecting wires.
Useful: to the kinetic store of the trolley and by light from the lamp. Dissipated: to the thermal stores of the track and the connecting wires.
Useful: to the kinetic store of the trolley and to the thermal store of the connecting wires. Dissipated: by light from the lamp and to the thermal store of the track.
Useful: to the kinetic store of the trolley only. Dissipated: by light from the lamp and to the thermal stores of the track and the connecting wires.
104 exam-style questions on AQA GCSE Physics 1.2 Conservation and dissipation of energy, covering 1.2.1 Energy transfers in a system and 1.2.2 Efficiency. Each one has a worked solution and a mark scheme showing where the marks go.