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How to find the acceleration given time and total distance

  1. Feb 10, 2010 #1
    1. The problem statement, all variables and given/known data

    A sprinter starts from rest and reaches his top speed in 4 seconds running with a constant acceleration. He then maintains that top speed and finishes the 100 m dash in the overall time of 10 seconds. Find his acceleration.
    Ans: 3.125 m/s2

    When I use the average acceleration the answer is wrong. What should I be doing?

    2. Relevant equations

    3. The attempt at a solution
  2. jcsd
  3. Feb 10, 2010 #2


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    Science Advisor
    Homework Helper

    Welcome to PF!

    Hi llach! Welcome to PF! :smile:

    (try using the X2 tag just above the Reply box :wink:)

    Show us your full calculations, and then we'll see what went wrong, and we'll know how to help! :smile:

    (btw, same for your other three questions)
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