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Displacement on a Position vs. Time Graph

  1. Aug 12, 2013 #1
    1. The problem statement, all variables and given/known data
    The graph is of a runner-
    time(min) is the x
    position(x1000 m) is the y
    these are the points
    0,0
    10,3
    20,3.5
    30,4.5

    The question is- For the time interval between 10 min and 20
    min, what is the runner’s displacement?
    Answer in units of m



    2. Relevant equations



    3. The attempt at a solution
    The position for 10 min is 3000 and the position for 20 is 3500. I subtracted 3500 from 3000 to get 500, what i thought would be the displacement. This is not the answer however and i don't know any other way to work out this problem. Help is appreciated, thanks!
     
  2. jcsd
  3. Aug 12, 2013 #2
    Hmmm... I think you are correct unless this is a funny question. If this was an online question, did you enter the units?
     
  4. Aug 12, 2013 #3
    Turns out it was 20,3.4 and not 3.5. Thanks though
     
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