Answer :


let θ be the angle made by rod connecting the masses during oscillations.


We know torque on the rod τ θ


Therefore τ = Kθ where k is torsional constant


Now work done w = = K/2


From work energy theorem , change in kinetic enrgy is equal to work done


K/2 where I =


=


Tension in the string is due to centripetal force and also weight and is resultant of both .


T= =


substituting ω


T =


54.png


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