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Distance using acceleration and time

  1. Sep 1, 2012 #1
    1. The problem statement, all variables and given/known data
    A car accelerates from 15 m/s to 28 m/s in 6.4 s. How far did it travel in this time?


    2. Relevant equations
    Unsure- have tried several, and all results have been wrong
    Part 1 was to determine acceleration, which is 2 m/(s^2)

    3. The attempt at a solution
    I've come up with 44, 41, 19, and 83 meters, all of which have been wrong.
     
  2. jcsd
  3. Sep 1, 2012 #2

    Doc Al

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    Staff: Mentor

    Seems OK

    Show what you've done.

    There are several ways to solve this. One way is to use the average speed.
     
  4. Sep 1, 2012 #3

    rock.freak667

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    Homework Helper

    Do you know your kinematic equations?

    Alternatively, if you plot a v-t graph, do you know how to obtain the distance traveled from that graph?
     
  5. Sep 1, 2012 #4
    I got it; I was using one formula, when I should have been using d=((vf+vi)/2)*t
     
  6. Sep 1, 2012 #5

    rock.freak667

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    Homework Helper

    Using d=ut + 1/2 at2 should have given the same answer.
     
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