Four electric motors are used to lift loads.
The table shows the work done by each motor and the time taken.
| Motor | Work done by motor (J\text{J}J) | Time taken (s\text{s}s) |
|---|---|---|
| A | 80 00080\,00080000 | 40 |
| B | 120 000120\,000120000 | 20 |
| C | 80 00080\,00080000 | 20 |
| D | 120 000120\,000120000 | 40 |
Which motor produces the most power?
Motor A
Motor B
Motor C
Motor 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.