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Concepts Of Physics MCQ Edition [Volume 1]PhysicsRotational Mechanics

A kid of mass M stands at the edge of a platform of radius R which can rotate freely about its axis. The moment of inertia of the platform is I . The system is initially at rest, and the kid holds a ball of mass m while standing on the rim. He throws the ball horizontally, tangential to the rim, with speed v as seen by his friend. Find the angular velocity with which the platform starts rotating.

Options

  1. AmvR I + MR^2
  2. BmvR I
  3. Cm v I + MR^2
  4. DmvR I + (M + m)R^2

Correct answer

A. mvR I + MR^2

Step-by-step solution

mvR I + MR^2

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