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The moment of inertia of a door of mass ...

The moment of inertia of a door of mass `m`, length `2 l` and width `l` about its longer side is.

A

`(11 m I^(2))/24`

B

`(5m I^(2))/24`

C

`(mI^(2))/3`

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
C
(about (YY')) `=(mI^(2))/12`
Using parallel axis theorem,
I(about AD) = `(mI^(2))/12 + (mI^(2))/4 = (mI^(2))/3`
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