Halley268315
Answered

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A stone is dropped from the roof of a building. It took 5 s for the stone to reach the ground. What is the height of the building?

Sagot :

discipulus

Answer:

[tex]resolving \: \\ (\downarrow_{ + }) \: s = ut + \frac{1}{2} g {t}^{2} \\ u = 0 ,\: g = 9.81m. {s}^{ - 2} , \: t = 5s \\ s =h= \frac{1}{2} g {t}^{2}, = \frac{1}{2} (9.81){5}^{2}\\=4.9\times25 \\ h=122.6m[/tex]

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