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renee1234
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Homework Statement
In the figure, a string is used to pull a disk of radius 18 cm and mass 9.3 kg. If the incline is 37° and the tension in the string is 20 Newtons find the acceleration of the disk and the force of friction on it.
Homework Equations
T=I(alpha)
The Attempt at a Solution
T=I(alpha) --> Rmg=(1/2mR^2+mR^2)(alpha)
I moved the pivot to the contact point of the ramp.
Alpha= 2/3 g/r
a=2/3g
this can't be right though because I didn't figure the tension into it.
I'm lost. please help
[PLAIN]http://www.usi.edu/science/physics/pickett/205/16p3f1.jpg
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