A sphere of radius ` 0.1m` and mass `8 pi` `kg` is attached to the lower end of a steel wire of length `5.0 m` and diameter `10^(-3)m`. The wire is suspended from `5.22 m` high ceiling of a room . When the sphere is made to swing as a simple pendulum, it just grazes the floor at its lowest point. Calculate the velocity of the sphere at the lowest position . Young's modulus of steel is `(1.994xx10^(11) N//m^(2))`.