12 A circular disc of radius of gyration 20 cm at rest is dropped over another disc of same mass but double the radius of

Question

12 A circular disc of radius of gyration 20 cm at rest is dropped over another disc of same mass but double the radius of gyration rotating with 5 rad s If both the discs club together and rotate as one body about the same axis then the new combined angular speed of the discs is 01 rad s 02 rad s 03 rad s 04 rad s 4 points

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