Levers

Give me a place to stand

An interactive lesson with 7 steps, about 6 minutes: you predict, drag and solve, with instant feedback on every answer. It runs in your browser and needs JavaScript.

What you’ll learn

• Mechanical advantage = load ÷ effort. For a lever, effort arm ÷ load arm.
• More force always means more distance: you trade one for the other.
• Some levers (forearms, tweezers) deliberately trade force for distance and speed.

Steps

1. Crowbar
2. Mechanical advantage
3. Lift the rock
4. No free lunch
5. Balance the seesaw
6. Three classes
7. Your forearm