Balanced forces are forces that are equal in size and opposite in direction. When balanced forces act on an object, they do not cause any change in motion. For example, when you push on an object with the same amount of force from opposite sides, the forces are balanced, and the object does not move. Another example of balanced forces can be seen in the game tug-of-war, where the same number of people hold onto each end of a rope, and the forces on the rope are balanced.

In contrast, unbalanced forces are forces that are not equal in size and opposite in direction. When unbalanced forces act on an object, they cause a change in motion, such as a change in speed or direction. For example, if you push an object with more force on one side than the other, the forces are unbalanced, and the object will move in the direction of the greater force.

To summarize, balanced forces are equal in size and opposite in direction, and they do not cause any change in motion. Unbalanced forces are not equal in size and opposite in direction, and they cause a change in motion.