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A play ground merry go round has a radius of 3.0 m and a rotational inertia...

A play ground merry go round has a radius of 3.0 m and a rotational inertia of 600 kg x m2. A 25 g child pushes and jumps on the edge. it is then spinning at 0.80 rad/s. the child then crawls from the rim to the very center of the merry go round. Now how fast does it spin?

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By cemerwakon veled 1.2.

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