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NEET · Physics · STD 11 - 4.1 newtons laws of motion
A person standing on the floor of an elevator drops a coin. The coin reaches the floor in time \(t_{1}\) if the elevator is at rest and in time \(t_{2}\) if the elevator is moving uniformly. Then
- A \(\mathrm{t}_{1}<\mathrm{t}_{2}\) or \(\mathrm{t}_{1}>\mathrm{t}_{2}\) depending upon whether the lift is going up or down
- B \(\mathrm{t}_{1} < \mathrm{t}_{2}\)
- C \(\mathrm{t}_{1} > \mathrm{t}_{2}\)
- D \(\mathrm{t}_{1}=\mathrm{t}_{2}\)
Answer & Solution
Correct Answer
(D) \(\mathrm{t}_{1}=\mathrm{t}_{2}\)
Step-by-step Solution
Detailed explanation
\(\mathrm{t}=\sqrt{\frac{2 \mathrm{h}}{\mathrm{a}_{\mathrm{real}}}}\) In both cases \(a_{\mathrm{real}}=\mathrm{g}-0=g\) ,
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