question_answer

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 the plane. It follows that:

A)  the speed of the particle is constant

B)  the acceleration of the particle is constant

C)  the motion is that of a projectile

D)  the velocity of the particle is constant

E)  the kinetic energy of the particle changes with time