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Homework Help: Angular acceleration of a computer disk

  1. Feb 21, 2008 #1
    1. The problem statement, all variables and given/known data

    During normal operation, a computer's hard disk spins at 5400 rpm. If it takes the hard disk 8.4 s to reach this angular velocity starting from rest, what is the average angular acceleration of the hard disk in rad/s2?

    2. Relevant equations


    3. The attempt at a solution

    I don't even know where to start. Physics is not my strong point, and I definitely do not like angular physics problems.
  2. jcsd
  3. Feb 21, 2008 #2
    See your other topic where I just posted my generic rotational motion advice

    With that in mind, remember that 2pi radians/second = 1 revolution per second so you can convert 5400 rpm to rad/sec

    So similar to the other problem you have "distance", time, and initial "velocity"(ie angle traveled, time, and initial angular velocity)
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