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Angular velocity of a machine problem

  1. Nov 24, 2009 #1
    A machine rotates at an angular velocity of 1.6rad/s. Its velocity is then increased to 6.2rad/s at an angular acceleration of 0.7rad/s2. (a) How many revolutions does it make during its acceleration? (b) How long does the acceleration take?


    Sorry I'm not quite sure as how to approach this problem, and I don't even know where to begin. Any advice would be greatly appreciated.
     
  2. jcsd
  3. Nov 24, 2009 #2
    Do you know any equation that relates revolutions, angular velocity, angular acceleration, and time? Can you then show some work? Thanks.
     
  4. Nov 25, 2009 #3
    aright i got it thanks! i used:

    [tex]\omega[/tex]=[tex]\omega[/tex]0+[tex]\alpha[/tex]t

    and

    [tex]\theta[/tex]=[tex]\theta[/tex]0+[tex]\omega[/tex]0+[tex]\frac{1}{2}[/tex][tex]\alpha[/tex]t2
     
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