# Find acceleration of a modified atwood machine

1. Jun 10, 2009

### sunniexdayzz

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
$$\sumF=ma$$
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. Jun 10, 2009

### rock.freak667

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