Lever classes lab
Inventors (Intermediate), mission I4 Levers, Linkages & Cams, lesson 3 of 6.
Hook
Pliers, see-saws and tweezers are all levers, but different kinds. Which kind is this gate?
Fair test
Move the pivot 3 times. Measure the force to lift the gate with a spring scale each time.
Bonus challenge
Find one of each lever class in your pencil case.
The build
- 🚧 Parking Barrier Gate: A long striped barrier that lifts with a tiny turn — thanks to a heavy counterweight. (level 2 of 5, about 20 minutes, 9 steps)