A rigid parking barrier is held horizontal and can turn about a pivot at one end. A cable provides the effort force. The perpendicular distance from the pivot to the line of action of the cable force is 0.25 m. The weight of the barrier acts at a perpendicular distance of 1.25 m from the pivot. The two forces produce moments in opposite directions and the barrier does not rotate.
Explain how the size of the force exerted by the cable compares with the weight of the barrier.
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.