In a forced vortex motion, the velocity of flow is ____. | Fluid Mechanics Questions

a)    directly proportional to its radial distance from axis of rotation
b)    inversely proportional to its radial distance from the axis of rotation
c)    inversely proportional to the square of its radial distance from the axis of rotation
d)    directly proportional to the square of its radial distance from the axis of rotation
Ans: a