A nut requires a moment of 9.0 N m to turn. A student can apply a maximum force of 30 N at right angles to a spanner. What is the minimum distance from the nut at which the force must act?
300 cm300\ \mathrm{cm}300 cm
3.3 cm3.3\ \mathrm{cm}3.3 cm
30 cm30\ \mathrm{cm}30 cm
270 cm270\ \mathrm{cm}270 cm
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.