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Homework Help: Flywheel rotation

  1. Nov 8, 2005 #1
    The flywheel of a steam engine begins to rotate from rest with a constant angular acceleration of 1.33 rad/s2. It accelerates for 23.5 s, then maintains a constant angular velocity. Calculate the total angle through which the wheel has turned 48.7 s after it begins rotating.
    [tex] \omega = \omega _ o + \alpha t [/tex]
    [tex] \omega = 0 + 1.33(23.5)[/tex]
    [tex] \omega= 31.26 [/tex]
    [tex] 31.26 = \Delta \theta / \Delta t [/tex]
    Solving for [tex] \theta [/tex] gave me 1522.1 rad
    which wasn't right.. can someone please help me?
     
  2. jcsd
  3. Nov 8, 2005 #2
    Find the angle unwound during its acceleration.
    Find the angle unwound during the rest of the time while its at a constant rotation speed.

    Add.
     
  4. Nov 8, 2005 #3
    I'm stupid :tongue2:
    Thanks
     
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