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How do I find velocity from acceleration?

  1. Mar 5, 2010 #1
    How do I find velocity from acceleration??

    1. An automobile and a truck start from rest at the same instant, with the automobile initially at some distance behind the truck. The truck has a constant acceleration of 2.00 , and the automobile an acceleration of 3.42 . The automobile overtakes the truck after the truck has moved a distance 41.0 .



    r=r+Vt+1/2at^2



    I get 40=vf^2/4, which gives me 40, but that's not right.
     
  2. jcsd
  3. Mar 5, 2010 #2

    tiny-tim

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    Welcome to PF!

    Hi dyslexiateech ! 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 hlep! :smile:
     
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