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Rotational motion

  1. Oct 27, 2010 #1
    1. The problem statement, all variables and given/known data
    A merry-go-round has a radius of 5 meters and an angular velocity of 1/4 pii radians per second. How long does it take the merry go round to make one revolution? How many turns per min?


    2. Relevant equations
    radius of 5 meters and an angular velocity of 1/4 pii radians per second


    3. The attempt at a s
    1/4 * 57.295 = 14.323
    I am really lost with this problem.
     
  2. jcsd
  3. Oct 27, 2010 #2
    If it takes 1 second to go 1/4 pi radians, how long does it take to go 2pi radians (the complete circle)?
    theta = omega*t
    and theta = 2pi here

    If it takes t seconds for one revolution, the number of revolutions/min is 60/t
     
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