Mon Prof Augmenté
Short Jaws, Stronger Crush
Age 12 · Physics
Two open pliers sit on a bench. The short pliers crack a walnut, while the long pliers leave a same-sized walnut whole.
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 September 13, 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.
In the picture
- Badge 1 sits on the cracked walnut held between the short pliers' jaw tips.
- Badge 2 sits on the pivot of the short pliers.
- Badge 3 sits on the whole walnut held between the long pliers' jaw tips.
- Badge 4 sits on the hanging weight at the end of the long pliers' handle.
Examples
- A nutcracker
- A pair of pliers
Key takeaways
- A shorter jaw shortens the load arm at the bite, so the same pull makes more force.
- A longer jaw spreads the same pull over a longer arm, so the tip pushes with less force.
Quiz: Short Jaws, Stronger Crush (Age 12)
-
Why can a short jaw crush an object harder than a long jaw when the same force is used?
-
If two pairs of pliers are pushed with the same force, which tip presses harder?
-
What does the length of a jaw change in a pair of pliers?
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.
Get the app
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
