Final answer:
A body can have zero velocity and a speed of 10 m/s if it travels in a round trip, ending up at the starting point, since velocity includes direction and displacement would be zero. Additionally, a constant velocity might indicate zero velocity if there is no change over time.
Step-by-step explanation:
A body may have a zero velocity even if its speed is 10 m/s in a scenario where it makes a round trip. For instance, if an object travels away from its starting point and then returns to the same point, over the course of the round trip, it will have covered distance at a speed of 10 m/s, but its displacement upon returning to the start is zero. This results in a zero velocity, as velocity includes both speed and direction of motion. Furthermore, constant velocity can imply zero velocity if there is no change in speed or direction over time.