question_answer 46)

                  For a particle performing uniform circular motion, choose the correct statement (s) from the following: (a) Magnitude of particle velocity (speed) remains constant. (b) Particle velocity remains directed perpendicular to radius vector. (c) Direction of acceleration keep changing as particle moves. (d) Angular momentum is constant in magnitude but direction keeps changing.

Answer:

                  (a, b, c) In uniform circular motion, speed remains constant, direction of velocity is tangent to the point on a circle and direction of acceleration keeps changing as particle moves.