I NEED HELP I AM SO CONFUSED, WILL GIVE BRAIN. 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?

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asked Nov 3, 2022 116k views

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I NEED HELP I AM SO CONFUSED, WILL GIVE BRAIN.

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?

Physics
high-school

Pavel Levin asked

by Pavel Levin

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1 Answer

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Answer:

$resolving \: \\ (\downarrow_( + )) \: s = ut + (1)/(2) g {t}^(2) \\ u = 0 ,\: g = 9.81m. {s}^( - 2) , \: t = 5s \\ s =h= (1)/(2) g {t}^(2), = (1)/(2) (9.81){5}^(2)\\=4.9*25 \\ h=122.6m$