equilibrium

Equilibrium is a state of balance. It means that there is no change in the system. For example, if you have a cup of water that is sitting on a table, the water is in equilibrium. The water is not moving, and the temperature is not changing.

There are two types of equilibrium: static equilibrium and dynamic equilibrium. Static equilibrium is when a system is not moving. Dynamic equilibrium is when a system is moving, but the overall motion is balanced.

An example of static equilibrium is a ball sitting on a table. The ball is not moving, and the forces acting on it (gravity and the table pushing up on the ball) are balanced.

An example of dynamic equilibrium is a river flowing. The water is moving, but the overall motion of the river is balanced. The water is flowing downhill, but the river is also being pushed back up by the ground.

The equilibrium state of the system was stable.