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MHT CET202619 April 2026Morning ShiftPhysicsLaws of MotionActual

Which of the following person is in an inertial frame of reference?

Options

  1. AA pilot in an aeroplane which is taking off.
  2. BA driver driving a bus which is moving with constant velocity.
  3. CA child revolving in a merry - go - round.
  4. DA man in a train which is slowing down to stop.

Correct answer

B. A driver driving a bus which is moving with constant velocity.

Step-by-step solution

An inertial frame of reference is a frame that is non-accelerating. It is either at rest or moving with a constant velocity. An aeroplane taking off has a net forward acceleration, making it a non-inertial frame. A child revolving in a merry-go-round undergoes circular motion and experiences centripetal acceleration, making it a non-inertial frame. A train slowing down is decelerating, meaning it has a non-zero acceleration, making it a non-inertial frame. A bus moving with constant velocity has zero acceleration.

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