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Question 30277
JEE Physics · Hard

Laws of Motion and Friction: Advanced — Rotating Frame MCQ

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Advanced — Rotating FrameHardQuestion 30277

Question

A bead on a rotating horizontal rod (angular velocity ω) at distance r from the axis experiences, in the rotating frame:
  1. A
    Centripetal force = mω²r inward
  2. B
    Centrifugal pseudo force = mω²r outward
    Correct
  3. C
    No force (it is stationary in that frame)
  4. D
    Coriolis force only

Correct answer

Centrifugal pseudo force = mω²r outward

Explanation

In the rotating (non-inertial) frame, a pseudo centrifugal force mω²r acts outward, plus Coriolis force if the bead moves. If bead is stationary in rotating frame, only centrifugal force acts.

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