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Area of a Triangle - by Heron's Formula

An elevator i...

Question

An elevator is moving upwards with a constant speed of $10 m / s e c$ . A man standing in the elevator drops a coin from $2.5 m$ . The coin reaches the floor of the elevator after a time $[g = 10 m / s^{2}] .$

A

\frac{1}{2} s

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B

\frac{1}{\sqrt{2 s}}

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C

\sqrt{2 s}

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D

2 s

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Solution

The correct option is B $\frac{1}{\sqrt{2 s}}$

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