A rod of length \( \mathrm{L} \), whose lower end is resting on the horizontal plane, starts to ...

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A rod of length \( \mathrm{L} \), whose lower end is resting on the horizontal plane, starts to topple from the
\( \mathrm{P} \)
vertical position. The velocity of the upper end
W
when it hits the ground is
(1) \( \sqrt{g L} \)
(2) \( \sqrt{5 g L} \)
(3) \( \sqrt{3 g L} \)
(4) \( 3 \sqrt{g L} \)
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