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Average speed homework

  1. Sep 10, 2007 #1
    1. The problem statement, all variables and given/known data

    What is its average speed during the first 35 s?

    (Figure shows the displacement-time graph of a gerbil running inside a straight length of clear plastic tubing.)

    2. Relevant equations


    3. The attempt at a solution

    2 m / 35 sec = .06
    its wrong though
  2. jcsd
  3. Sep 10, 2007 #2


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    Since [tex]u_{average} = \frac{s_{total}}{t_{total}}[/tex], have to calculate the total distance travelled (not displacement), and divide it by the total time. To find the total distance, you would have to find the sum of the area under the curve.
  4. Sep 10, 2007 #3
    how would u do that like a triangle? h = 2 b = 35 A=35 its wrong:(
  5. Sep 10, 2007 #4


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    Homework Helper

    Hmmm... seems to me like your original answer is right, but you didn't carry enough decimal places... maybe 0.0571m/s ?
  6. Sep 10, 2007 #5


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    Homework Helper

    that would be for a v-t graph wouldn't it? not a d-t graph.
  7. Sep 10, 2007 #6
    thanks a lot i guess i wasnt suppose to round
  8. Sep 10, 2007 #7


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    Homework Helper

    no prob. did the answer go through?
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