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Homework Help: Angular acceleration problem

  1. Oct 13, 2006 #1
    This is the last problem that is frustrating me...

    A wheel, starting from rest, rotates with a constant angular acceleration of 1.20 rad/s2. During a certain 5.00 s interval, it turns through 32.5 rad. (a) How long had the wheel been turning before the start of the 5.00 s interval? (b) What was the angular velocity of the wheel at the start of the 5.00 s interval?

    Any help would be appreciated!!!
     
  2. jcsd
  3. Oct 13, 2006 #2
    Hint:

    You can apply the formula that you use for the rectilinear movement:

    [tex]\Delta x = V_0t+\frac{1}{2}at^2[/tex]

    and

    [tex]V_f=at[/tex]

    Replacing

    [tex]\Delta x[/tex] for [tex]\Delta \theta[/tex]

    [tex]V_0[/tex] for [tex]\omega_0[/tex]

    [tex]\alpha[/tex] for a

    bye
     
    Last edited: Oct 13, 2006
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