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State PCS PYQPrelims 2022

BPSC – Combined Competitive Examination · Question 116

If the Earth's speed of rotation increased, the weight of a body at the equator would:

  1. decrease
  2. not change
  3. double
  4. increase
  5. None of the above / More than one of the above
Show answer & explanation

Answer: (A) decrease

Explanation

At the equator effective g = g − ω²R, so faster rotation lowers weight (no change at the poles).

  • (A) Correct

    Correct: greater centrifugal effect reduces apparent weight (g' = g − ω²R).

  • (B) Incorrect

    Wrong: it does change at the equator.

  • (C) Incorrect

    Wrong: incorrect.

  • (D) Incorrect

    Wrong: it decreases.

  • (E) Incorrect

    Wrong: only one of the options A–D is correct.