Gears
Physics: AQA GCSE Higher, topic 5.3.19
Gears
We use levers and gears to transmit (send) the rotational effect of a force from one place to another.
Interlocking teeth
- Gears are circular discs with ‘teeth’ around their edges.
- Their teeth interlock. So if we turn one gear, another turns in the opposite direction.
Transmit rotational effect
- A set of gears can transmit (send) the rotational effect of a force from one place to another.
Changing moment
- We can use different sized gears to change the moment of the force.
- For example, if we send a force to a larger gear, there will be a bigger moment.
- This is because the distance to the pivot is greater.
Test yourself on Gears
What is the name for circular disks with interlocking teeth, used to transmit rotational effects?
Which of these are true of gears?