Centripetal force 'F' required for circular motion of an object of mass 'm' movingin circle of radius 'r' at a tangential velocity 'v' is equal to ..........

A

$$\frac{mr}{v^2}$$

B

$$\frac{mv^2}{r}$$

C

$$\frac{mv}{r^2}$$

D

$$\frac{mr^2}{v}$$