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47. Four particles each of mass m are placed at the corners of a square of side length l. The radius of gyration of the system about an axis perpendicular to the square and passing through its centre is

(a)   l/ √2

(b)   l/2

(c)   l

(d)   (√2)l

Ans. a

(32)

5/5 - (2 votes)

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