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Homework Help: Angular acceleration and speed

  1. Mar 31, 2009 #1
    1. The problem statement, all variables and given/known data

    A mass attached to a 43.9 cm long string starts from rest and is rotated 35 times in 57.0 s before reaching a final angular speed. Determine the angular acceleration of the mass, assuming that it is constant and determine the angular speed after 57 sec.


    2. Relevant equations
    V=rW
    W=2pi*f
    f=1/T
    T=time it takes for one revolution
    3. The attempt at a solution
    T=35/57 sec gives you T=.614 s
    I'm not sure where to go from there... am I missing an equation that links all of these together?
     
  2. jcsd
  3. Mar 31, 2009 #2

    LowlyPion

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