about its symmetry axis

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A circular disk of moment of inertia It is rotating in a horizontal plane, about its symmetry axis, with a constant angular speed ωi. Another disk of moment of inertia Ib is dropped coaxially on to the rotating disk. Initially the second disk has zero angular speed. Eventually both the disks rotate with a constant angular speed ωf ​. The energy lost by the initially rotating disc to friction is
23
Oct
A circular disk of moment of inertia It is rotating in a horizontal plane, about its symmetry axis, with a constant angular speed ωi. Another disk of moment of inertia Ib is dropped coaxially on to the rotating disk. Initially the second disk has zero angular speed. Eventually both the disks rotate with a constant [...]
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Tags: A circular disk of moment of inertia It is rotating in a horizontal plane , A solid sphere is rotating about a diameter at an angular velocity ω. If it cools so that its radius reduces to I/n of its original value , about its symmetry axis , its angular velocity becomes ,