An electric hoist takes 1.5 minutes1.5\text{ minutes}1.5 minutes to lift a heavy cargo container. The change in gravitational potential energy of the container is 450 kJ.
What is the useful power output of the hoist?
5.0 kW5.0\text{ kW}5.0 kW
300 kW300\text{ kW}300 kW
675 kW675\text{ kW}675 kW
40 500 kW40\,500\text{ kW}40500 kW
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.