Stable, Unstable, and Neutral Equilibrium

The video explains the concept of gravitational potential energy in different objects. It describes how the energy of a ball remains constant regardless of its position, resulting in a horizontal line on a graph. The water bottle is in stable equilibrium as its energy increases when moved away from equilibrium, causing it to return naturally. Conversely, the dry erase marker is in unstable equilibrium, with its energy decreasing as it moves away, causing it to move further from equilibrium.

What happens to the center of mass of the water bottle as it moves away from the equilibrium position?

How does the gravitational potential energy of the dry erase marker change as it moves away from the equilibrium position?