A boy of mass M stands at the edge of a circular platform of radius R capable of rotating freely about its axis. The moment of inertia of the platform about the axis is I. The system is at rest. A friend of the boy throws a ball of mass m with a velocity v horizontally. The boy on the platform catches it when it passes tangentially to the platform. Find the angular velocity of the system after the boy catches the ball.

A boy of mass M stands at the edge of a circular platform of radius R

1.	A boy of mass M stands at the edge of a circular platform of radius R capable of rotating freely about its axis. The moment of inertia of the platform about the axis is I. The system is at rest. A friend of the boy throws a ball of mass m with a velocity v horizontally. The boy on the platform catches it when it passes tangentially to the platform. Find the angular velocity of the system after the boy catches the ball.
Answer» A boy of mass $M$ stands at the edge of a circular platform of radius $R$ capable of rotating freely about its axis. The moment of inertia of the platform about the axis is $I$ . The system is at rest. A friend of the boy throws a ball of mass $m$ with a velocity $v$ horizontally. The boy on the platform catches it when it passes tangentially to the platform. Find the angular velocity of the system after the boy catches the ball.

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