Which two physical quantities must be used to calculate the average power developed by an electric motor lifting a heavy load?
the force exerted on the load and the distance it is lifted only
the force exerted on the load and the time taken only
the work done on the load and the distance it is lifted only
the work done on the load and the time taken only
95 exam-style questions on CIE IGCSE Physics 1.7.4 Power. Each one has a worked solution and a mark scheme showing where the marks go.