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Question 30631
JEE Physics · Hard

Circular Motion: Effective g in Rotating Frame MCQ

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Effective g in Rotating FrameHardQuestion 30631

Question

At the equator, if Earth's rotation were fast enough that centripetal acceleration = g, objects would:
  1. A
    Weigh twice as much
  2. B
    Float (apparent weight = 0)
    Correct
  3. C
    Have infinite weight
  4. D
    Not be affected

Correct answer

Float (apparent weight = 0)

Explanation

Effective weight = m(g − ω²R). If ω²R = g, effective weight = 0 → objects float (as in orbit).

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