A communications reflector is mounted on a support that can rotate about a pivot. A cable pulls on the support with a tension of 350 N. The cable produces an anticlockwise moment in both arrangements.
| Cable arrangement | Perpendicular distance from the pivot to the line of action of the tension in m |
|---|---|
| A | 0.16 |
| B | 0.28 |
A counterweight produces a constant clockwise moment of 80 Nm.
Calculate the increase in the moment of the cable tension when the cable is changed from arrangement A to arrangement B.
The support is released with the cable in arrangement B.
Explain what happens to the support.
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.