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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: a) 1.2 rad/s b) 0.4 rad/s c) 0.7 rad/s d) 2 rad/s

Text Solution

Verified by Experts

angular momentum of man `=` angular momentum of platform in opposite direction
or `mv_(0)r=Iomega` `omega=0.7`rad/s
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