1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

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
    [tex]\sumF=ma[/tex]
    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

    rock.freak667

    User Avatar
    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
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook