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Homework Help: Average Velocities

  1. Sep 21, 2010 #1
    I have a question about average velocity. It's defined as the net displacement divided by the time. So if I have an object moving at a constant speed on a circular path, is the average velocity zero every time the object returns to the starting point? My reasoning is that the net displacement is zero.
  2. jcsd
  3. Sep 21, 2010 #2


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    Your reasoning is correct!
  4. Sep 21, 2010 #3
    Yes thats right. The average velocity is zero. But the average speed is not.
  5. Sep 21, 2010 #4
    Ok, that's what I thought. My professor worked out a problem where the object returned to the starting point, and claimed a value for the average velocity. I think she meant average speed and left me confused. :confused:
  6. Sep 21, 2010 #5
    Well yes, that is a common mistake ;)
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