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Homework Help: The 200g model rocket,Angular acceleration

  1. May 19, 2012 #1
    1. The problem statement, all variables and given/known data
    The 200g model rocket shown in figure 13.24 generates 4.0Nthrust. It spins in a horizontal circle at the end of a 100g rigid rod. what is its angular acceleration?
    http://s3.amazonaws.com/answer-board-image/c5d72a35f06dfbd77d87ba51ac9eaa51.jpg

    2. Relevant equations





    3. The attempt at a solution
    Tnet= F*d= 4.0sin45*0.6
    =1.70N.m
    angular acc=Tnet/MR^2 =1.70/0.2*(0.6)^2
    =23.57 rad/s
     
    Last edited: May 19, 2012
  2. jcsd
  3. May 21, 2012 #2
    The total moment of inertia is I of rocket plus I of rod.
     
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