Sprint 77 · Chapter 6

Equilibrium, Couples And Levers

A rigid body balances only when both the net force and the net torque are zero. Meet the couple and the lever.

1. 1Two Conditions for Equilibrium
2. 2Moment of a Couple Everywhere
3. 3Principle of Moments and the Lever
4. 4Balancing on the See-Saw
5. 5The Metre Stick on a Knife Edge
6. 6The Metre Stick and Two Coins
7. 7Your Turn: Another Balance