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Homework Help: Tangential Acceleration Problem.

  1. Nov 4, 2007 #1
    Okay. So i've got three cars that are traveling along a hilly road. One is at the beginning, where its flat, one is at the bottom of the hill, one is at the top. Each is traveling at 21 m/s. I am supposed to find tangential acceleration for each.

    I tried:
    a = v^2 / r but that is radial acceleration.
    I know the formula for tangential acceleration is a = (alpha)(r)

    but i am given no times or anything to calculate alpha.

    I'm thinking I need a relation of some sort between radial and tangential accelerations.

    Anyone have any guidelines?

    Attached Files:

  2. jcsd
  3. Nov 4, 2007 #2
    Guess I should have posted this in homework help section. Apologies, I will from this point on.
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