Basic Maths and Units and DimensionsHard

Question

Three identical rods, each of length l, are joined to form a rigid equilateral triangle. Its radius of gyration about an axis passing through a corner and perpendicular to the plane of the triangle is

Options

A.l
B.
C.
D.

Solution

           
MI of the system w.r.t an axis  ⏊  to plane & passing through one corner



Now    ML2 = 3k2

 k =   

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