Two thin rings, each of mass m and radius R are rigidly attached with each other as shown in figure. Then moment of inertia of the system of rings about the diameter AB is
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a
34mR2
b
2mR2
c
52mR2
d
32mR2
answer is C.
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Detailed Solution
For ring (1), (IAB)1=12mR2For ring (2), (IAB)2=mR2+mR2=2mR2∴(IAB)system=12mR2+2mR2=52mR2
Two thin rings, each of mass m and radius R are rigidly attached with each other as shown in figure. Then moment of inertia of the system of rings about the diameter AB is