Mon Prof Augmenté
Gears That Turn Each Other
Age 11 · Technology
When you turn a gear, its teeth push the teeth of the next gear, so that gear turns the other way. If a big gear drives a small one, the small gear has to spin faster to keep up.
This picture is part of the full library
Every lesson is open to everyone for 7 days after it is published. This one came out on October 28, 2026: its text stays readable here, and its picture opens with a subscription.
The app is free. A subscription opens every lesson, in every school year.
Age 11: open this week
Browse Age 11
In the picture
- Large gear turned by the crank: it spins one way, slowly
- Small gear: it spins the opposite way, and faster
- Interlocking teeth: they push each other and pass on the turning
Examples
- On a bicycle, the big front gear by the pedals makes the small back gear and wheel spin quickly.
- Inside a hand egg beater, a big gear turns small gears so the beaters whirl fast.
Key takeaways
- Two meshing gears always turn in opposite directions.
- A small gear driven by a big gear spins faster.
Quiz: Gears That Turn Each Other (Age 11)
-
Two gears are meshed together. When the first gear turns, which way does the second gear turn?
-
A big gear is turning a small gear. How does the small gear spin compared to the big one?
-
How does one gear pass its turning on to the next gear?
The answers, each with its explanation, are in the app. This lesson has left the free week, so its quiz is part of the subscription.
Free app, optional subscription
App Store Google Play
Carry on in the app
At least one new illustrated lesson every weekday for your child’s year, with its quiz and a reminder at 6:15 pm.
Your child’s teacher does not use My Enhanced Teacher yet?
Tell them about it
