A particle is acted upon by a force of constant magnitude which is always perpendicular to the velocity of the particle. The motion of the particle takes place in a plane. It follows that

Options

A. Its velocity is constant
B. Its acceleration is constant
C. Its kinetic energy is constant
D. It moves in a straight line

Answer

C

Explanation

Circular motion
Where `vec(a) _|_ vec(v) :.` speed constant