A cyclist pushes vertically downwards on a bicycle pedal with a force of 500 N.
The pedal is joined to the axle by a crank of length 0.17 m.
Assume that the force always acts vertically downwards.
Calculate the maximum moment of the force about the axle.
State the position of the crank when this moment is produced.
Explain why the force produces no moment when the crank is vertical.
At one position of the crank, the distance normal to the direction of the force, from the axle to the line of action of the force, is 0.12 m.
Calculate the moment about the axle at this position.
The front gear is fixed to the same axle as the crank. The radius of the front gear is 0.10 m.
Calculate the force in the chain when the moment about the axle is the maximum moment.
102 exam-style questions on Edexcel GCSE Physics 9.2 Moments, covering 9.2.1 Rotational effects of forces and moments, 9.2.2 The principle of moments, and 9.2.3 Levers and gears. Each one has a worked solution and a mark scheme showing where the marks go.