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A horizontal rod of mass m=(3k)/(pi^2) k...

A horizontal rod of mass `m=(3k)/(pi^2)` kg and length L is pivoted at one end . The rod at the other end is supported by a spring of force constant k. The rod is displaced by a small angle `theta` from its horizontal equilibrium position and released . The time period (in second) of the subsequent simple harmonic motion is

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