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Calculate magnitude of the centripetal acceleration onthe outside radius ofthe disk

  1. May 28, 2012 #1
    1. The problem statement, all variables and given/known data
    The hard drives of many desktop computers spin at a maximum rate of 7200 rpm. If the diameter of the spinning disk in the harddrive is 3.51 cm, calculate the magnitude of the centripetal acceleration on the outside radius of the disk.


    2. Relevant equations
    ac=v2/r


    3. The attempt at a solution
    r=0.01755 meters
    but i don't know how to get the velocity from rpms
     
  2. jcsd
  3. May 28, 2012 #2

    tiny-tim

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    hi goracheski! :smile:
    one revolution = one circumference …

    how long is a circumference? :wink:
     
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