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49. Three point masses m1, m2, m3 are located at the vertices of an equilateral triangle of length ‘a’ . The moment of inertia of the system about an axis along the altitude of the triangle passing through m1 is

(a)    (m2+m3)a4/4

(b)    (m 1+m2+m 3)a2

(c)    (m1+m2)a2/2

(d)    (m2+m3)a2

Ans. a

(47)

5/5 - (1 vote)

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