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Homework Help: Magnitude of acceleration

  1. Dec 10, 2015 #1
    1. The problem statement, all variables and given/known data
    can someone tell me why the acceleration in n direction is 18ms^-2 ? i only understand that the centripetal acceleration = 18ms^-2

    2. Relevant equations

    3. The attempt at a solution

    Attached Files:

  2. jcsd
  3. Dec 10, 2015 #2
    I think your question is answered in the second image, in the text above. It's simply plugging the centripetal acceleration into the equation for net force. :P
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