A body of mass m is moving with uniform speed in a horizontal circle of radius r under a centripetal force `(k)/(r^(2))`, where k is a constant. The K.E. of body is :

Options

A. `(k^(2))/(r )`
B. `(k)/(2r )`
C. `(k)/(r ^(2))`
D. `(k)/(r )`

Answer

B