MHT CET Physics question
M.I. of a thin uniform rod about the axis passing through its centre and to its length is . The rod is cut transversely into two halves, which are then rivetted end to end. M.I. of the composite rod about the axis passing through its centre and to its length will be
Answer: (B)
Solution
Joining the two halves end to end gives back a uniform rod of the same mass and length , so its moment of inertia about the centre is unchanged, ;
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