A gardener has to lift a heavy bag of compost from the ground onto a raised display. There are two platforms: a low platform and a high platform.
Which action involves the gardener doing the least amount of work?
Lifting the bag quickly to the high platform
Lifting the bag slowly to the high platform
Lifting the bag to the low platform first then lifting it to the high platform
Lifting the bag to the low platform instead of to the high platform
67 exam-style questions on CIE IGCSE Physics 1.7.2 Work done. Each one has a worked solution and a mark scheme showing where the marks go.