What are balanced forces? what are unbalanced forces?

Forces that are equal in size but opposite in direction are called balanced forces. Balanced forces do not cause a change in motion. When balanced forces act on an object at rest, the object will not move ... Forces that cause a change in the motion of an object are unbalanced forces.

Forces that are equal in size, but opposite in direction are called balanced forces.

Forces that cause a change in motion of objects are called unbalanced forces.