A uniform maintenance platform is 1.60 m long. It rests horizontally on a pivot 0.50 m from its left-hand end. All positions are measured from the left-hand end of the platform.
| Arrangement | Downward forces and positions |
|---|---|
| 1 | 90 N at 0.10 m |
| 2 | 90 N at 0.25 m and 20 N at 1.25 m |
The platform is balanced in arrangement 1.
Calculate the weight of the platform.
The platform is changed to arrangement 2.
Calculate the resultant moment about the pivot and give the direction in which the platform will start to turn.
102 exam-style questions on Edexcel GCSE Physics 9.2 Moments, covering 9.2.1 Rotational effects of forces and moments, 9.2.2 The principle of moments, and 9.2.3 Levers and gears. Each one has a worked solution and a mark scheme showing where the marks go.