I'm not sure how to do the last problem in this pdf:
h t t p : / / t i n y u r l . c o m / y 9 q f 4 7 4
Any help would be appreciated. Thank you!
http://tinyurl.com/y9qf474
well, you know that I=sum mr^2= you can do that for the masses.
Then, pulling force is 4mg, and torque= I alpha
4m*g*r=I above*angular acceleartion
but angular acceleration= a/r
so you can solve for a.
c) energy work in block going down= energy in rotation+ energy in downward block