A simple pendulum has length l- The minimum velocity to be pendulum so that it performs vertical circular motion issqrt -gl- sqrt2-gl- sqrt5-gl- sqrt -frac-1-g-

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A simple pendulum has length l. The minimum velocity to be pendulum so that it performs vertical circular motion is√gl√2gl√5gl√1g

A simple pendulum has length l. The minimum velocity to be pendulum so that it performs vertical circular motion is
$\sqrt{g l}$
$\sqrt{2} g l$
$\sqrt{5} g l$
$\sqrt{\frac{1}{g}}$