Mr. smith is designing a race where velocity will be measured. which course would allow velocity to accurately get a winner?

Velocity is Displacement / Time

In order for Velocity to Accurately get a winner, you should be able to determine the race by looking at How Far the competitors are from the starting point in the shortest amount of time

so the answer should be something like : a 5 mile course from the center of the town  heading north to the outskirts of the town