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A pendulum of length \( \ell=\mathrm{Im} \) is released from \( \theta_{0}=60^{\circ} \). The rate of change of speed of the bob
\( \mathrm{P} \) at \( \theta=30^{\circ} \) is \( \left(\mathrm{g}=10 \mathrm{~m} / \mathrm{s}^{2}\right) \) :-

W
(1) \( 5 \sqrt{3} \mathrm{~m} / \mathrm{s}^{2} \)
(2) \( 2.5 \mathrm{~m} / \mathrm{s}^{2} \)
(3) \( 10 \mathrm{~m} / \mathrm{s}^{2} \)
(4) \( 5 \mathrm{~m} / \mathrm{s}^{2} \)
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