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A uniform rod \( \mathrm{AB} \) of length \( l \) and mass \( m \) is free to rotate about \( A \). The rod is released
\( \mathrm{P} \) from rest in the horizontal position. Given that the moment of inertia of the rod about
W.
\( \mathrm{A} \) is \( \frac{m l^{2}}{3} \), the initial angular acceleration of the rod will be:
(1) \( \frac{3 g}{2 l} \)
(2) \( \frac{2 g}{2 l} \)
(3) \( m g \frac{g}{2} \)
(4) \( \frac{3}{2} g l \)
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