A warehouse worker uses a rigid metal bar to raise one edge of a packing case. A fixed support acts as the pivot. The packing case and the worker act on opposite sides of the pivot.
The packing case exerts a downward force of 600 N on the bar. The greatest downward force the worker can exert is 100 N. Both forces act perpendicular to the bar. Ignore the weight of the bar.
| Arrangement | Distance from pivot to packing case force in m | Distance from pivot to worker's force in m |
|---|---|---|
| A | 0.20 | 0.80 |
| B | 0.10 | 0.90 |
Determine which arrangement, if either, allows the worker to raise the packing case.
Use calculations to support your answer.
124 exam-style questions on AQA GCSE Physics 5.4 Moments, levers and gears, covering 5.4 Moments, levers and gears. Each one has a worked solution and a mark scheme showing where the marks go.