When do balanced forces acting on an object result in no change in motion?

Balanced forces acting on an object lead to no change in motion when they cancel each other out. This means that the forces opposing one another are equal in magnitude but act in opposite directions, resulting in a total force of zero. When the resultant force is zero, an object will either remain at rest or continue moving at a constant velocity, according to Newton's first law of motion.

In scenarios where forces do not cancel out or result in a net force, such as when they create a resultant force, act in the same direction, or when they are unequal, the object's motion will change, either accelerating or decelerating depending on the direction and size of the net force acting on it. Hence, it is the balance and cancellation of these forces that ensure there is no alteration in the state of motion.