Question

if a pair of forces are unbalanced, the motion of that object will ______. non - existent be unchanged cancel out be changed

Explanation:

According to Newton's second law of motion, when an unbalanced force acts on an object, it causes a change in the object's velocity (either in magnitude or direction). Unbalanced forces do not cancel out (that's for balanced forces). Motion being non - existent is not a general result (an object could be in motion and then have its motion changed). And motion being unchanged is for balanced forces.

Answer:

be changed