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A turntable turns about a fixed vertical...

A turntable turns about a fixed vertical axis, making one revolution in `10 s`. The moment of inertia of the turntable about the axis is `1200 kgm^(2)`. A man of `80 kg`, initially standing at centre of the turnable, runs out along the radius. What is the angular velocity of the turtable when the man is `2 m` from the centre?

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