A particle performing uniform circular motion has constant:
Correct answer: B. Acceleration
- A. Velocity
- B. Acceleration
- C. Position
- D. Momentum
Explanation
In uniform circular motion, the magnitude of linear velocity remains constant although its direction changes every instant. A centripetal acceleration is produced as a result, directed towards the centre of the circular path. The centripetal acceleration is constant, and is given by mv²/r. Velocity cannot be constant, as explained above. Position, of course, cannot remain constant. Since velocity is not constant, momentum cannot be constant. Since it is acceleration that has a constant magnitude and direction so, option B is correct.
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About Acceleration
Acceleration measures the rate at which velocity changes with time, including changes in speed, direction or both. Work includes average and instantaneous acceleration, the relation a = Δv/Δt, uniform acceleration equations, and interpreting velocity time and displacement time graphs, with acceleration carefully distinguished from velocity.
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