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Angular speed of the pulley

  1. Nov 3, 2016 #1
    1. The problem statement, all variables and given/known data
    problem.png

    2. Relevant equations
    v=rω
    conservation of energy

    3. The attempt at a solution 20161103_145743.jpg

    I don't know whether it is correct or not, and I am quite confused in part b
    it asks the angular speed of the pulley
    can I say that v=rω since the pulley and box A,B have a common velocity?
    so is ω equal to 1/R*√((2gh)(mA-mB)/(mA+mB+I/R^2))?
    but the question is worth 10 marks:H
     
  2. jcsd
  3. Nov 3, 2016 #2

    haruspex

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    That all looks right.
     
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