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A rod of length 50 cm is pivoted at one end. It is raised such that it makes an angle of 30$°$ from the horizontal as shown and released from rest. Its angular speed when it passes through the horizontal (in rads$^{-1}$) will be ($g = 10$ ms$^{-2}$)
(1) $\sqrt{\frac{30}{7}}$
(2) $\sqrt{30}$
(3) $\sqrt{\frac{20}{3}}$
(4) $\sqrt{\frac{30}{2}}$
BETA
