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Homework Help: Angular Acceleration

  1. Oct 30, 2008 #1
    1. a) A X kg toy car accelerates at constant rate from Vo m/s to Vf m/s in C revolutions while going around a circular track of radius R cm. Find:

    - α, the magnitude of the angular acceleration of the car.
    - t, the time it took to reach the final speed

    2. To calculate the angular acceleration, I tried velocity over radius, Vo/R and Vf/R to get delta W(omega); and then tried using the formula Wf2 = Wo2 + 2*alpha*(C*2*Pi), and solved for alpha, but got the wrong answer. I do not know how to get time without acceleration. Any help would be appreciated.
    1. The problem statement, all variables and given/known data

    2. Relevant equations

    3. The attempt at a solution
  2. jcsd
  3. Oct 30, 2008 #2


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    Homework Helper

    Hi cobrasny,

    What answer did you get?
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