Thanks a lot for that tip...
So by using moment, i would have...
(Iinitial)(winitial) = (Ifinal)(wfinal)
(1/2)(m1)(r1)^2(w1) = (1/2)(m1(r1)^2+m2(r2)^2)(w2) where w2 is the final angular velocity
I get 49.89rad/s for w2...just wanted to confirm i was doing it right...
Homework Statement
A 1.6 kg disk with radius 0.63 m is rotating freely at 55 rad/s around an axis perpendicular to its center. A second disk that is not rotating is dropped onto the first disk so that their centers align, and they stick together. The mass of the second disk is 0.45 kg and...