A stone thrown vertically upward files past a window one second after it was thrown upward and after three second on its way downward. The height of the window above the ground is (Take $g = 10ms^{- 2}$)

Question

Dr. Abubacker · Accepted Answer

(b) $h = vt - \frac{1}{2}gt^{2}$ or $\frac{1}{2}gt^{2} - vt + h = 0$
or $gt^{2} - 2vt + 2h = 0\  \Rightarrow \ t_{1}t_{2} = \frac{2h}{g}$
$1 	imes 3 = \frac{2h}{10}$ or 2$h$ =30m or $h = 15$m

Q. A stone thrown vertically upward files past a window one second after it was thrown upward and after three second on its way downward. The height of the window above the ground is (Take $g = 10ms^{- 2}$)

Explanation

Reviewed by Dr. Abubacker

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