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eagles12
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Homework Statement
An Atwood's machine consists of two masses, m1 and m2, connected by a string that passes over a pulley.
If the pulley is a disk of radius R and mass M, find the acceleration of the masses.
Express your answers in terms of variables m1,m2, M, R, and appropriate constants
Homework Equations
The Attempt at a Solution
I got the equation a=g*m1-m1/m1+m2 but it said this was incorrect because i need to function in M, the mass of the pulley. I am not sure how to incorporate that though.
I also tried a=g*m1-m2/m1+m2+I/r^2
it said this was incorrect also