MHT CET202520 Apr 2025Morning ShiftPhysicsLaws of MotionActual
Which one of the following person is in an inertial frame of reference?
Options
- AA person (man) in a train which is slowing down to stop.
- BA person (child) revolving in a merry-go-round.
- CA person (driver) in a bus which is moving with constant velocity.
- DA person (pilot) in an aeroplane which is taking off.
Correct answer
C. A person (driver) in a bus which is moving with constant velocity.
Step-by-step solution
An inertial frame of reference is defined as one moving with constant velocity (including rest), where Newton's first law holds true. Frames undergoing acceleration are non-inertial. A person on a train slowing down experiences deceleration, indicating a non-inertial frame. Circular motion on a merry-go-round involves centripetal acceleration, also non-inertial. A bus moving at constant velocity has zero acceleration, making it an inertial frame. An airplane taking off accelerates during departure, resulting in a n