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Circular Motion: Circular Motion — Change in Velocity MCQ

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Circular Motion — Change in VelocityMediumQuestion 30653

Question

A particle in circular motion (speed v, radius r) rotates through 90°. The magnitude of change in velocity is:
  1. A
    0
  2. B
    v
  3. C
    √2 v
    Correct
  4. D
    2v

Correct answer

√2 v

Explanation

Initial velocity v (say, east). After 90°, velocity v (north). |Δv| = √(v²+v²) = v√2.

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