NEET 2024 · PhysicsInertiaPrevious Year Question
A person standing on the floor of an elevator drops a coin. The coin reaches the floor in time t₁ if the elevator is at rest, and in time t₂ if the elevator is moving uniformly. Then:
Answer: (D) t₁ = t₂. Correct Answer (D) Solution: Uniform velocity ⇒ inertial frame, identical to rest.
- A.t₁ < t₂ or t₁ > t₂ depending on the direction of motion
- B.t₁ < t₂
- C.t₁ > t₂
- D.t₁ = t₂✓
Correct Answer
(D) t₁ = t₂
Solution & Explanation
Correct Answer (D) Solution: Uniform velocity ⇒ inertial frame, identical to rest. The coin falls freely through the same height with acceleration g in both cases, so t = √(2h/g) is the same: t₁ = t₂.
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