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Homework Help: Simple rotational mechanics

  1. Apr 20, 2010 #1
    1. The problem statement, all variables and given/known data
    If a CD makes 1500 revolutions in 5 minutes, what is the CD's average rotational speed (in units of rad/s)

    2. Relevant equations

    [tex]\omega = \frac{\Delta\theta}{\Delta t}[/tex]


    [tex]\omega = \frac{2\pi}{\Delta t}[/tex]

    3. The attempt at a solution

    This problem seems a little too simple (and I didn't use the given equation), so I want to make sure I did it right:

    [tex](5min)(60s/min)=300 seconds in 5 minutes[/tex]

    Last edited: Apr 20, 2010
  2. jcsd
  3. Apr 20, 2010 #2
    You didn't answer the question; how many radians are there in one revolution?
  4. Apr 20, 2010 #3

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