Table shows the useful output energy transfer and the total input energy transfer for four motors. Which motor is the most efficient?
Table: The useful output energy transfer and the total input energy transfer for four motors
| Motor | Useful output energy transfer in J | Total input energy transfer in J |
|---|---|---|
| W | 120 | 400 |
| X | 90 | 250 |
| Y | 210 | 600 |
| Z | 160 | 400 |
Motor W
Motor X
Motor Y
Motor Z
40 exam-style questions on AQA GCSE Physics 1.2 Conservation and dissipation of energy, covering 1.2.1 Energy transfers in a system and 1.2.2 Efficiency. Each one has a worked solution and a mark scheme showing where the marks go.