A mechanical timer uses a driving gear and a driven output gear whose teeth interlock directly. The output gear must rotate anticlockwise at a different rate from the driving gear. The available gears have either 20 teeth or 30 teeth.
Which arrangement should be used?
A 20-tooth driving gear turning clockwise, with a 20-tooth output gear.
A 20-tooth driving gear turning anticlockwise, with a 20-tooth output gear.
A 20-tooth driving gear turning clockwise, with a 30-tooth output gear.
A 20-tooth driving gear turning anticlockwise, with a 30-tooth output gear.
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.