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Atwoods machine, solve for mass

  1. Mar 9, 2010 #1
    1. The problem statement, all variables and given/known data
    A simple Atwood's machine uses two masses, m1 and m2. Starting from rest, the speed of the two masses is 3.0 m/s at the end of 3.0 s. At that instant, the kinetic energy of the system is 60 J and each mass has moved a distance of 4.5 m. Determine the values of m1 and m2.


    2. Relevant equations
    The equation I know that must be used is K=.5mv^2 where K is kinetic energy, m is mass, and v is velocity.
    But I'm having a hard time finding another equation to solve for the masses.


    3. The attempt at a solution
    scan0001.jpg
    scan002.jpg

    Sorry if the pictures are hard to see my writing in. I tried to edit them so my writing was easier to see.
     
  2. jcsd
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