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A circular platform is mounted on a vert...

A circular platform is mounted on a vertical frictionless axle. Its radius is `r = 2 m` and its moment of inertia`I = 200 kg m^2`. It is initially at rest. A `70 kg` man stands on the edge of the platform and begins to walk along the edge at speed `v_0 = 1 m s^-1` relative to the ground. The angular velocity of the platform is.

Text Solution

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Angular momentum of man=angular momentum of plateform in opposite direction.
`mv_(0)r=IomegarArromega=0.7rad//s`
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