Q.

A wheel comprises of a ring of radius R and M and three spokes of mass m each moment of inertia of the wheel about its axis is:

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a

M+m4R2

b

M+mR2

c

M+3mR2

d

M+3m2R2

answer is B.

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Detailed Solution

Moment of inertia of the ring is MR2  and that of each spoke is mR23 .Total moment of inertia  MR2+mR23×3=M+mR2
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