An electric screwdriver uses a gear system. A small gear on the motor drives a larger gear attached to the screwdriver bit.
Explain why the screwdriver bit turns more slowly than the motor.
Explain why this gear system allows the screwdriver to turn a stiff screw.
A student says that the gear system increases the energy transferred by the motor. Explain why the student is wrong.
40 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.