A particle of mass m is moving in a horizontal circle of radius r, under a centripetal force `F = (k)/(r^(2))`, where k is a constant.

Options

A. The potential energy of the particle is zero
B. The potential energy of the particle is `(k)/(r)`
C. The total energy of the particle is `-(k)/(2r)`
D. The kinetic energy of the particle is `-(k)/(r)`

Answer

A

Explanation

For horizontal planes potential energy remains constant equal to zero, if we assume surface to be the zero level.