In a thread-winding machine, a motor turns gear A. The teeth of gear A interlock with gear B, and the teeth of gear B interlock with gear C.
| Gear | Number of teeth |
|---|---|
| A | 16 |
| B | 40 |
| C | 24 |
Gear A rotates clockwise at 90 revolutions per minute.
Calculate the rate of rotation of gear B.
Calculate the rate of rotation of gear C.
Explain how the direction of rotation of gear C compares with the direction of rotation of gear A.
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.