A satellite completes one revolution of a planet in almost exactly one hour. At the end of one hour, the satellite has traveled 2.0 × 107 meters and is only 10 meters away from its starting point. What is the numerical value of the satellite's average velocity after that one hour?

Question

wolfcherry · Answer

(10 m)/(1 h) = 10 m/h = 0.01 km/h. 

2.0 × 10⁷ m is the distance traveled, but it is 10 m away from its starting point, and that is its displacement. 
Velocity = displacement/time, not to be confused with speed (distance/time).