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Homework Help: Finding m#2

  1. Sep 28, 2010 #1
    1. The problem statement, all variables and given/known data
    M1 and M2 are two masses connected as shown. The pulley is light and frictionless. Find the mass M1, given that M2 (7.00kg) accelerates downwards at 2.43m/s2, that the angle theta is 15.0o, and that muk is 0.560.

    prob75_fricpullplane.gif

    2. Relevant equations

    (Read below)

    3. The attempt at a solution

    I was sick the day we went over this and the notes I got do not tell me very much. That is why I have no attempts at this problem. Basically what I need is some guidance on where to start and how to find the equation needed for this problem. I am lost with where to start.

    Thank you all for your help,
    John
     
  2. jcsd
  3. Sep 28, 2010 #2
    What is the sum of the forces in the y direction for M2? What are the sums (in x and y) for M1? Can you relate those equations together?
     
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