A crane lifts a heavy cargo container vertically upwards.
In which of the following cases does the crane do the most work on the container?
The crane lifts the container 4.0 m4.0\text{ m}4.0 m in 10 s10\text{ s}10 s.
The crane lifts the container 5.0 m5.0\text{ m}5.0 m in 50 s50\text{ s}50 s.
The crane holds the container stationary at a height of 2.0 m2.0\text{ m}2.0 m for 120 s120\text{ s}120 s.
The crane holds the container stationary at a height of 8.0 m8.0\text{ m}8.0 m for 10 s10\text{ s}10 s.
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.