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Three identical rods, each of mass m and...

Three identical rods, each of mass `m` and length `l`, form an equaliteral triangle. Moment of inertia about one of the sides is

A

`(mI^(2))/4`

B

`2/3 mI^(2)`

C

`(3mI^(2))/4`

D

`(mI^(2))/2`

Text Solution

Verified by Experts

The correct Answer is:
D
`I=I_(1) + I_(2) + I_(3)`
`=(mI^(2))/(3)sin^(2)60^(@) + (mI^(2))/3 sin^(2)60^(@) + 0=2 xx (mI^(2))/3 xx 3/4 = (mI^(2))/2`
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