Physical Pendulum Restoring Torque

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A uniform rod of length L and mass m is pivoted at one end and is free to rotate in a vertical plane. For a small angular displacement θ from its equilibrium position, what is the approximate restoring torque τ on the rod?

$mg\frac{L}{2}\theta$

$-\frac{mgL}{2}\theta$

$-mgL\theta$

$-mg\frac{L}{2}\theta$

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