A circular platform is mounted on a vertical frictionless axle. Its radius is r = 2m and its moment of inertia is 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 sped V_(0)=1.0 m//s relative to the ground. Find the angular velocity of the platform.

A circular platform is mounted on a vertical frictionless axle. Its ra

1.	A circular platform is mounted on a vertical frictionless axle. Its radius is r = 2m and its moment of inertia is 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 sped V_(0)=1.0 m//s relative to the ground. Find the angular velocity of the platform.
Answer» SOLUTION :Angular MOMENTUM of MAN = angular momentum of platform in opposite direction. or `mv_(0)=I omega rArr omega = 0.7` rad/s.