A ball of mass m is attached to one end of a light rod of length l, the other end of…

Physics · JEE Advanced · NTA Exams — Rotational Motion

A ball of mass m is attached to one end of a light rod of length l, the other end of which is hinged. What minimum velocity v should be imparted to the ball downwards, so that it can complete the circle.

1. \(\sqrt{\mathrm{g} \ell}\)
2. \(\sqrt{5 \mathrm{~g} \ell}\)
3. \(\sqrt{3 \mathrm{~g} \ell}\)
4. \(\sqrt{2 \mathrm{~g} \ell}\)

Answer

(D) 2 ~g

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