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Homework Help: Quick question about no. of revs

  1. Apr 6, 2010 #1
    1. The problem statement, all variables and given/known data
    How many complete revolutions does the CD make as it spins to a stop?

    3. The attempt at a solution

    I already know that the Angular displacement is 68.1 rad

    The answer is [tex]\frac{68.1}{2\pi}[/tex] = 107 revolutions

    however this is incorrect according to the book's answer's

    P.S
     
    Last edited: Apr 6, 2010
  2. jcsd
  3. Apr 6, 2010 #2
    Check your division.
     
  4. Apr 6, 2010 #3
    it gives me 10.83,i round it up to 11 and it is still incorrect.

    by the way the answer should be integer.
     
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