A rod \( P Q \) of mass \( M \) and length \( L \) is hinged at end...

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A rod \( P Q \) of mass \( M \) and length \( L \) is hinged at end P. The rod is kept horizontal by a massless string tied to point \( \mathrm{Q} \) as shown in figure. When string is cut, the initial angular acceleration of the rod is
(1) \( \frac{g}{L} \)
(2) \( \frac{2 g}{L} \)
(3) \( \frac{2 g}{3 L} \)
(4) \( \frac{3 g}{2 L} \)
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