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State PCS PYQPrelims 2023

BPSC – Combined Competitive Examination · Question 21

Two objects of different masses falling freely near the surface of the Moon would:

  1. have different accelerations
  2. undergo a change in their inertia
  3. have the same velocity at any instant
  4. experience forces of the same magnitude
Show answer & explanation

Answer: (C) have the same velocity at any instant

Explanation

On the airless Moon all bodies fall with the same acceleration (~1.62 m/s²), so released together they have equal velocities.

  • (A) Incorrect

    Wrong: free-fall acceleration is independent of mass.

  • (B) Incorrect

    Wrong: inertia depends on mass, which does not change.

  • (C) Correct

    Correct: with no air and equal acceleration, their velocities stay equal.

  • (D) Incorrect

    Wrong: force (weight) is proportional to mass, so differs.