The useful power output of a parcel conveyor is 1.8 kW.
The conveyor has an efficiency of 0.60 and operates for 2.5 minutes2.5\ \mathrm{minutes}2.5 minutes.
Calculate the energy dissipated in unwanted transfers while the conveyor operates.
128 exam-style questions on Edexcel GCSE Physics 8.3 Power and efficiency, covering 8.3.1 Power and 8.3.2 Efficiency. Each one has a worked solution and a mark scheme showing where the marks go.