There are three types of equilibrium: stable, unstable, and neutral. A system is in stable equilibrium if, when displaced from equilibrium, it experiences a net force or torque in a direction opposite...There are three types of equilibrium: stable, unstable, and neutral. A system is in stable equilibrium if, when displaced from equilibrium, it experiences a net force or torque in a direction opposite to the direction of the displacement. A system is in unstable equilibrium if, when displaced, it experiences a net force or torque in the same direction as the displacement from equilibrium. A neutral equilibrium is if its equilibrium is independent of displacements from its original position.