Circular Motion #11

A small bob hangs in the vertical plane from a fixed point using a light inextensible thread of length $l$ . Let the minimum horizontal velocity that the bob should be given so that it moves in a complete circle be $v_{min}$ .

If $v_{min}$ can be written as $\sqrt{ A g l}$ where $g$ is the gravitational field, find the value of the constant $A$ .

Note: Neglect air resistance.

This problem is part of the set - Circular Motion Practice