A mechanical clock contains two gears in separate parts of its mechanism. A force acts at the teeth of each gear, perpendicular to the radius. Gear P has a radius of 12 mm and gear Q has a radius of 36 mm. The two forces produce equal moments about the gear axles.
Which statement explains how the force at the teeth of gear P compares with the force at the teeth of gear Q?
The forces on both gears are equal because the moments produced by the forces are equal
The force on gear P is smaller because its smaller radius increases the effect of the force
The force on gear P is larger because it acts at a smaller distance from the axle
The force on gear Q is larger because it acts at a greater distance from the axle
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.