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Angular Velocity HELP

  1. Nov 12, 2007 #1
    James move sin a circular path (radius 15.0m) with a speed of 60 m/s. His angular acceleration in rpm is?

    DO you ahve to convert to rad/s then to rev/s then rev/m?

    Any help would be appreciated
     
  2. jcsd
  3. Nov 12, 2007 #2

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    Do you know the relationship between angular speed and angular acceleration? Study the problem carefully.
     
  4. Nov 12, 2007 #3
    youw ould have to fine the arc length correct? 15x2(pi) = 94.24777. but I keep thinking i would have to have time before i can solve this problem
     
  5. Nov 12, 2007 #4

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    If James is going at a constant linear speed, the angular speed is also constant. Does that mean anything?
     
  6. Nov 12, 2007 #5
    so divide that by 60 seconds which would give me 1.5707 rad/s. Is this correct so far?
     
  7. Nov 12, 2007 #6

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    I am just wondering, have you been asked to find angular speed or acceleration?
     
  8. Nov 12, 2007 #7
    Angular velocity
     
  9. Nov 12, 2007 #8

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    Then why did you ask for acceleration????

    Well, w=v/r. Convert as you said in your first post. 1 rev/s = 2*pi rad/s.
     
  10. Nov 12, 2007 #9
    Sorry about that! but thanks a lot, very much appreciated!
     
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