The picture above shows two masses in an equilibrium. Physicists see this situation through the lenses of forces and their respective arms (an arm is the distance from pivot point to the point where the force is exerted).
counterclockwise torque (the left side) = 26 cm * 100 g = 2600 cm*g
clockwise torque (the right side) = 13 cm * 200 g = 2600 cm*g
