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Q.

Three point masses each of mass m are placed at the corners of an equilateral triangle of side b. The moment of inertia of the system about an axis coinciding with one side of the triangle is.

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a

3 m b2

b

m b2

c

(3 /4) m b2

d

(2 /3) m b2

answer is C.

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Detailed Solution

M.I. =m(AD)2=m32b2=34mb2
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