Q. 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
A) Its velocity is constant
B) Its acceleration is constant
C) Its kinetic energy is constant
D) It moves in a straight line
Explanation
(c) When a force of constant magnitude acts on velocity of particle perpendicularly, then there is no change in the kinetic energy of particle.
Hence, kinetic energy remains constant.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.