I'm still confused...doesn't conservation of angular momentum state that L_i = L_f?
Would I need to find I_1 from 2mr^2/5 and w_1 from 2pi/T and set that equal to I_2*w_2to solve for I_2? Wouldn't that just give me the same value for the initial moment of inertia since the w values are the...
Hey, I'm having trouble with this problem as well and I still haven't been able to find the radius. I tried using mr^2 to find the moment of inertia, and then substituting the value into I = (2mr^2/5) to find the radius but it was incorrect. Can anyone help?