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  • 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.

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 keeps changing as particle moves.

(d) Angular momentum is constant in magnitude but direction keeps changing.

Answers (1)

The answer is the option (a), (b), and (c)

Explanation:

Option a: speed is constant at all times in the case of uniform circular motion

Option b: in case of velocity, in a circular motion it is measured tangentially to the direction of motion of the particle which is in turn perpendicular to the radius.

Option c: the direction of the acceleration is in the direction of force always. This can concur with the newton’s second law of motion. So as the particle moves in the circular motion, the direction of force keeps on changing and hence that of acceleration also changes.

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