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Homework Help: Find acceleration of a modified atwood machine

  1. Jun 10, 2009 #1
    1. The problem statement, all variables and given/known data
    An Atwood machine is constructed using a disk of mass 2.4 and radius 23.4. What is the acceleration of the system? The acceleration of gravity is 9.8 .
    Picture: http://img.photobucket.com/albums/v356/SfTbLxMiShi/atwood.jpg

    2. Relevant equations
    torque = I(alpha)

    3. The attempt at a solution
    i tried to find the sum of the forces in the y direction for the 3 different bodies, then i tried to find the torque for the pulley and use one of the bodies' force and set it equal to the torque
  2. jcsd
  3. Jun 10, 2009 #2


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    Homework Helper

    Convert all the masses to weights, then find the resultant moment about the disk (the resultant of 1.66 and 1.28). Then use Torque=I*alpha
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