On a bicycle, the pedals turn a gear at the front. A chain connects this front gear to a gear on the back wheel.
The cyclist can change the back gear to a larger gear with more teeth.
Explain why it is easier for the cyclist to ride up a steep hill using a larger back gear.
Your answer should refer to forces, moments and the speed of the bicycle.
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.