Q. A body of mass $m$ is suspended from a string of length $l$. What is minimum horizontal velocity that should be given to the body in its lowest position so that it may complete one full revolution in the vertical plane with the point of suspension as the centre of the circle
A) $v = \sqrt{2lg}$
B) $v = \sqrt{3lg}$
C) $v = \sqrt{4lg}$
D) $v = \sqrt{5lg}$
Explanation
(d) For looping the loop minimum velocity at the lowest point should be $\sqrt{5gl}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.