Final answer:
Usain Bolt's speed is 10 m/s and his velocity is also 10 m/s with a specific direction.
Step-by-step explanation:
To find Usain Bolt's speed, we use the formula: speed = distance / time. In this case, the distance is 200m and the time is 20s. So his speed would be 200m / 20s = 10 m/s (meters per second).
Velocity, on the other hand, is a vector quantity that includes both speed and direction. Since the race is a circular track, the direction of Bolt's velocity would be tangential to the track at any particular point on it. Therefore, his velocity would also be 10 m/s, but with a specific direction given by the tangent to the track at that moment.
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