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Homework Help: Circular motion problem

  1. Oct 22, 2008 #1
    1. The problem statement, all variables and given/known data
    if you step on your car's breaks hard, the wheels stop turning after 1.0 revolution. At the same constant acceleration , how many revolutions do the wheels make before stopping if you initial speed is twice as high?

    2. Relevant equations

    3. The attempt at a solution
    im having trouble deciding which equations i should use....

    and also is the initial speed(referred to in the problem statement) the angular speed or the tangential speed?
    thanks in advance
  2. jcsd
  3. Oct 22, 2008 #2
  4. Oct 25, 2008 #3


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    Homework Helper

    Hi mjolnir80,

    I believe they are referring the the linear speed of the car (which is closely related to the angular speed of the wheels' rotation).

    For the equations, in the problem they mention constant acceleration and initial and final speeds, and revolutions. How can those quantities be related?
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