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Homework Help: Finding this displacement on a v/t graph

  1. Sep 20, 2009 #1
    1. The problem statement, all variables and given/known data


    theres a picture of the graph and i need to determine the displacement of the object within the first 18seconds of it. (in meters)

    2. Relevant equations

    area below line is displacement (i thought?)

    3. The attempt at a solution

    i just did some basic things:

    i found the height which is 18.

    and then i found the areas of all the triangles and rectangles under the line and added them up and got 171 or -171 but its not right

    any help?

    any help would be greatly appreciated, therefore i could do the rest on my own :)
  2. jcsd
  3. Sep 20, 2009 #2


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    Science Advisor
    Homework Helper

    Welcome to PF!

    Hi jeffc93! Welcome to PF! :smile:
    Nope :redface:

    area between line and horizontal axis (with areas below the axis counting as negative) is displacement. :wink:
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