A stone is dropped from the $25^{\text {th }}$ storey of a multistoried building and reaches the ground in $5 \mathrm{~s}$. In the first second, it passes through how many storeys of the building?$(g=10 \, \mathrm{m} / \mathrm{s}^{2})$

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Aicharya · Accepted Answer

Suppose $h$ be the height of each storey, then $25 h=0+\frac{1}{2} \times 10 \times t^{2}=\frac{1}{2} \times 10 \times 5^{2} \text { or } h=5 \mathrm{~m}$ In first second, let the stone passes through $n$ storey, so $n \times 5=\frac{1}{2} \times 10 \times(1)^{2}$ or $n=1$

A stone is dropped from the \(25^{\text {th }}\) storey of a multistoried building and reaches the ground in…

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