Rotational MotionHard

Question

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

Options

A.MR2ω
B.MR2ω
C.MR2ω
D.2MR2ω

Solution

Angular momentum of this disc about origin
= M(ωR) × R = MR2ω

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