Question

An object is moving with no net force acting upon it. what might describe the object motion

Answer 1

-- "No net force" implies no acceleration.

-- "No acceleration" implies constant uniform motion.

-- "Constant uniform motion" implies constant speed, in a straight line.

Answer 2

An object with no net force cannot experience acceleration as per Newton's Second Law. However, it is moving, so it is experiencing velocity. Since there is no acceleration, we can say that the object experiences constant velocity.