A wooden plank rests across two bricks, one under each end. A child stands at the centre of the plank. The plank bends but remains stationary. The weight of the plank can be ignored.
Explain why the plank bends but remains stationary.
Explain why the plank could not be bent if the child's downward force were the only force acting on it.
106 exam-style questions on AQA GCSE Physics 5.3 Forces and elasticity, covering 5.3 Forces and elasticity. Each one has a worked solution and a mark scheme showing where the marks go.