* Balanced forces are forces that are equal in strength and opposite in direction. They cancel each other out.

* Motion requires an unbalanced force. An unbalanced force is one where the forces acting on an object are not equal and opposite, resulting in a net force.

Example:

* Imagine a tug-of-war with two teams of equal strength. The forces are balanced. The rope won't move because the forces cancel each other out.

* If one team suddenly becomes stronger, the forces become unbalanced. The rope will move in the direction of the stronger team.

Key Concept:

* Newton's First Law of Motion (Inertia): An object at rest stays at rest, and an object in motion stays in motion at a constant speed and direction unless acted upon by an unbalanced force.

In short, balanced forces create a state of equilibrium, meaning the object remains at rest or continues moving at a constant velocity. It's only when forces become unbalanced that an object will accelerate or change its motion.