An equilateral triangular wire frame is made from 3 rods of equal mass and length each. The fra....

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An equilateral triangular wire frame is made from 3 rods of equal mass and length each. The frame is rotated about
P
an axis perpendicular to the plane of the frame and passing through its end. What is the radius of gyration of the frame?
(a)
(b)
(c)
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