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Angular Acceleration ( )

  1. Feb 15, 2008 #1
    Angular Acceleration (plz help)

    A cyclist starts from rest and pedals so that the wheels make 7.5 revolutions in the first 4.8 seconds. What is the angular acceleration of the wheels (assumed constant)?
  2. jcsd
  3. Feb 15, 2008 #2


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    Welcome to PF,

    One is expected to so one's own efforts before asking for help. So, what is the definition of angular acceleration?
  4. Feb 15, 2008 #3

    Angular velocity [omega]= velocity/radius of rotation

    Initial angular velocity=0 [starts from rest]
    Time=4.8 sec
    angular displacement=7.5 rev*2pi radian.
    Hence the equation...:

    Angular displacement=0+1/2 *angular accln *time^2

    Calculate angular accln.

    But this was the stereotype part....you must emphasize on the theory and the concept behind the problem..
    so answer the above question first...
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