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JEE Main Physics question

PhysicsSystems of Particles and Rotational MotionJEE Main

Three identical rods, each of length , 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

Answer: (A)

Solution

Treating the whole triangular frame's mass as effectively concentrated (for radius of gyration purposes) at a distance equal to where is the centroid, geometry of the

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Question ID VK-158465