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Question
For a particle performing uniform circular motion, choose the correct statement(s) from the following:
- Magnitude of particle velocity (speed) remains constant.
- Particle velocity remains directed perpendicular to radius vector.
- Direction of acceleration keeps changing as particle moves.
- Angular momentum is constant in magnitude but direction keeps changing.
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Solution
a, b and c
Explanation:
For a particle performing uniform circular motion.
- Speed will be constant throughout.
- Velocity will be tangential in the direction of motion at a particular point.
- Acceleration `a = v^2/r` will always be towards centre of the circular path.
- Angular momentum (mvr) is constant in magnitude and direction/out of the plane perpendicularly as well.
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