A crane is used on a construction site to lift loads of building materials from the ground to a scaffold platform.
State the type of energy gained by a load of bricks as it is lifted at a constant speed.
The crane lifts a second load of bricks to the same scaffold platform. The first load of bricks weighs 1200 N and the second load weighs 1800 N. On which load does the crane do more work? Explain your answer.
The crane operator wants to determine the useful power developed while lifting one of the loads. They already know the weight of the load. State the two other physical quantities they need to measure.
533 exam-style questions on CIE IGCSE Physics 1.7 Energy, work and power, covering 1.7.1a Energy stores and energy transfers, 1.7.1b Conservation of energy, 1.7.1c Kinetic and gravitational potential energy, 1.7.2 Work done, 1.7.3 Energy resources, 1.7.3a Energy resources and electricity generation, 1.7.3b Nuclear fusion as an energy source, 1.7.3c Efficiency of energy transfer, and 1.7.4 Power. Each one has a worked solution and a mark scheme showing where the marks go.