Question

what is the difference between balanced forces and action-reaction forces?

Answer 1

Explanation:

Balanced forces are equal and opposite forces that act on the same object. That's why they cancel out. Action-reaction forces are equal and opposite forces that act on different objects, so they don't cancel out

Answer 2

When forces on an object are balanced, there is no change in speed or direction.

To have unbalanced forces means that the force applied in one direction is greater than the force applied in the opposite direction. When unbalanced forces are acting on an object, there is a change in speed and/or direction.