Question

an object experiences a net zero external unbalanced force if possible for the object to be travelling with a non zero velocity if yes state the conditions that must be placed on the magnitude and direction of the velocity and if no provide a reason

Answer 1

no, there will no non zero velocity as no external force is there.

Answer 2

Yes, an object with a constant velocity will have zero net force. (Newton's first law of motion says that acceleration is zero if and only the net external force is zero.)