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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.

a
3 m b2
b
m b2
c
(3 /4) m b2
d
(2 /3) m b2

detailed solution

Correct option is C

M.I. =m(AD)2=m32b2=34mb2

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Three point masses, each of m, are placed at the corners of an equilateral triangle of side l. Then the moment of inertia of this system about an axis along one side of the triangle is


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