A disc of mass  $M$  and radius  $R$  is rolling with angular speed $\omega $ on a horizontal plane as shown. The magnitude of angular momentum of the disc about the origin $O$ is

828-288

  • A

    $\frac {1}{2} MR^2\omega $

  • B

    $MR^2\omega $

  • C

    $\frac {3}{2} MR^2\omega $

  • D

    $2MR^2\omega $

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