ITS PRETTY SIMPLE

 

 

first make the translation motion equations

 

mg=kN1 + N2

N2 = kN1

 

therefore

N1 = mg/k(sq)+1

and N2=kmg/k(sq) +1

 

now make the rotational motion equations

 

 alpha=   -2k(N1 + N2)/mr

 

using third eqn of motion

w(final)=4k(N1 + N2) *theta/mr

 

 

therefore no of revolutions= theta/2 pi = rw(sq)(k(sq) + 1)/8* pi* k* g(1+k)