Four cranes are used to lift cargo packages. The table shows the work done by each crane and the time taken to complete the lift.
| Crane | Work done by crane / J\text{J}J | Time taken / s\text{s}s |
|---|---|---|
| A | 120 000120\,000120000 | 30 |
| B | 120 000120\,000120000 | 60 |
| C | 240 000240\,000240000 | 30 |
| D | 240 000240\,000240000 | 60 |
Which crane produces the most power?
Crane A
Crane B
Crane C
Crane D
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.