Final answer:
The average velocity of an object on a round-trip journey is zero.
Step-by-step explanation:
The statement that the average velocity of an object on a round-trip journey would be 0 is true.
When an object makes a round trip, it travels away from its starting point and then returns to the same point. The displacement for the round trip is zero, as there is no net change in position. Therefore, the average velocity, which is calculated by dividing the total displacement by the total time taken, would be zero. However, it is important to note that the object is still traveling at a non-zero speed, as it covers some distance during the round trip.