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Rotational Speed

  1. Apr 23, 2009 #1
    1. The problem statement, all variables and given/known data
    Tire with a radius of 40cm spinning at 2500 rev/min. What is the rotational speed?


    2. Relevant equations
    w=v/r
    w=2500revmin/40cm
    w=62.5 rad/sec

    Does that sound right? I am confused
     
  2. jcsd
  3. Apr 23, 2009 #2
    Er... rev/min is a rotational speed.

    Im not too sure what you are trying to work out.
     
  4. Apr 23, 2009 #3
    Okay. Thats the exact problem I have on my sheet. I asked a few others and they said that the rev/sec is the rotational speed.
     
  5. Apr 23, 2009 #4
    Look at your formula, and look at the units involved.

    That will find a linear velocity at the outer edge of that ball, not rotational.
     
  6. Apr 23, 2009 #5
    Thanks for the help!
     
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