A student tests two bearings using the same flywheel. The flywheel is given the same starting speed each time and allowed to slow down until it stops. The student records the time taken to stop.
Use the results to identify which bearing dissipates energy more quickly and explain your choice.
| Bearing | Time taken for the flywheel to stop in seconds |
|---|---|
| A | 18 |
| B | 7 |
104 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.