There are two discs of masses 3.0 kg and 2.0 kg and radii 10 cmand 5 cm, respectively. The discs are rotating about theirrespective center of masses with angular speeds 200 rpm and 300rpm. The discs are brought together into contact face-to-face withtheir axes of rotation coincident. a) What is the angular speed ofthe two-disc system? b) What are the kinetic energies of the discswhen they were apart? Denote them as K1 and K2. c) What is thekinetic energy of the two-disc system? Denote it as K. d) Computedifference in kinetic energies |K – (K1+K2)|. How do you accountfor this difference in kinetic energy?
