Balance forces are two forces acting in opposite directions on an object, and equal in size. Anytime there is a balanced force on an abject, the object stays still or continues moving continues to move at the same speed and in the same direction. It is important to note that an object can be in motion even if there are no forces acting on it.
An unbalance force is one that is not opposed by an equal and opposite force operating directly against the force intended to cause a change in the object's state of motion or rest. ................
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Balanced forces are forces acting on a body in the opposite directions, but are equal. If balanced forces act on a stationary object, the net force acting on the object cancel out, because the forces acting on the object will be equal and opposite, and thus the object tends to remain at rest. If the balanced forces act on the object in uniform motion, then the object tends to remain in uniform motion.

Unbalanced forces are those forces that act on an object but are not equal. Unbalanced forces produce motion in a stationary object, or stop an object in motion.