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7. A circular disc of moment of inertia ...

7. A circular disc of moment of inertia I is rotat- ing in a horizontal plane, about its symmetry axis, with a constant angular speed 0. An- other disk of moment of inertia I, is dropped coaxially on to the rotating disk. initially the second disk has zero angular speed eventu- ally both the disks rotate with a constant an- gular speed @ The energy lost by the initially rotating disc due to friction is 1 I 1 1 1) 2(1.4i) 2) 2 (1+i) * 1 11 3) 1 Io +I. 02 2 (1, +in) 2(1, +i)"

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