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Three identical solid discs, each of mas...

Three identical solid discs, each of mass M and radius R, are arranged as shown in figure. The moment of inertia of the system about an axis AB will be

A

`(11)/(4)MR^(2)`

B

`(15)/(4)MR^(2)`

C

`(13)/(4)MR^(2)`

D

`(21)/(5)MR^(2)`

Text Solution

Verified by Experts

The correct Answer is:
B
`I=I_(1)+I_(2)+I_(3)`
`=(5)/(4)MR^(2)+(5)/(4)MR^(2)+(5)/(4)MR^(2)=(15MR^(2))/(4)`.
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Knowledge Check

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