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JEE Main Physics question

PhysicsSystems of Particles and Rotational MotionJEE Main

Two rods, each of mass and length , are joined at the centre to form a cross (+ shape). The moment of inertia of this cross about an axis passing through the common centre of the rods and perpendicular to the plane formed by them, is

Answer: (B)

Solution

For rotation about the perpendicular axis through the common centre, each rod contributes (standard rod-about-centre result applies

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Question ID VK-158491