Final answer:
Objects in stable equilibrium return to their initial position if displaced, while objects in unstable equilibrium move further away. Neutral equilibrium maintains the equilibrium regardless of displacement.
Step-by-step explanation:
To differentiate between stable and unstable systems, let's look at how objects in equilibrium behave when displaced. An object is in stable equilibrium when, if displaced, there is a net force or torque that acts in the opposite direction of the displacement, prompting it to return to its original position. Contrastingly, an object is in unstable equilibrium when a displacement causes a net force or torque to act in the same direction as the displacement, moving the object further away from equilibrium. Lastly, neutral equilibrium occurs if displacing the object does not affect its equilibrium state—it does not experience a net force or torque that either resists or promotes further displacement.
To answer the question about stability checking, it seems there might be a typo with 'BiBo,' as it's not clear what that term refers to in the context of stability. However, based on the concept of stable and unstable systems, the correct response would be that systems in stable equilibrium experience a restoring force or torque when displaced, and those in unstable equilibrium experience a force that further displaces them from their initial position.