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Car A is starting from rest and accelerating at 4.0 m/s^2, car B passes it

  1. Sep 25, 2014 #1
    1. The problem statement, all variables and given/known data
    Car A is starting from rest and accelerating at 4.0 m/s^2, car B passes it, moving at a constant speed of 28 m/s. How long will it take car A to catch up with car B.


    2. Relevant equations

    d=Vot+1/at^2

    3. The attempt at a solution

    Using the equation above, I used it for car A then car B and made them equal to each other. Got 2t^2 - 28t = 0 then solved. I got t= 14s.

    Are there any mistakes? Thanks so much.
     
  2. jcsd
  3. Sep 25, 2014 #2

    gneill

    User Avatar

    Staff: Mentor

    Your equation and result look fine.
     
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