A particle moves with constant angular velocity in a circular path. Which of the following physical

Question

A particle moves with constant angular velocity in a circular path. Which of the following physical quantities remains strictly constant throughout the motion?

Professor PC Thomas Classes · Answer

(c) : In uniform circular motion, the direction of linear velocity and centripetal acceleration keeps changing continuously. Therefore, they are not constant vectors, and linear momentum (which depends on velocity direction) also changes. However, the speed is constant, so kinetic energy ($K = \frac{1}{2}mv^2$) is a scalar quantity that remains strictly constant.