Question:
Which one of the following person is in an inertial frame of reference?
Which one of the following person is in an inertial frame of reference?
Show Hint
Inertial = No Acceleration ($a=0$). If the speed or direction is changing, it is non-inertial.
Updated On: May 14, 2026
- A person (man) in a train which is slowing down to stop.
- A person (child) revolving in a merry-goround.
- A person (driver) in a bus which is moving with constant velocity.
- A person (pilot) in an aeroplane which is taking off.
Show Solution
Verified By Collegedunia
The Correct Option is C
Solution and Explanation
Step 1: Concept
An inertial frame of reference is one that is either at rest or moving with a constant velocity (zero acceleration).
Step 2: Meaning
In such a frame, Newton's first law of motion holds true without the need for pseudo-forces.
Step 3: Analysis
(A) Slowing down = Deceleration (Accelerated frame).
(B) Revolving = Centripetal acceleration (Accelerated frame).
(C) Constant velocity = Zero acceleration (Inertial frame).
(D) Taking off = Increasing speed/Acceleration (Accelerated frame).
Step 4: Conclusion
Only the driver moving with constant velocity is in an inertial frame. Final Answer: (C)
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