Question

A ball is dropped from the roof of a building it takes 10 second to reach the ground find the height of the building (g is equals to 9.8 metre per second square)

Answer 1

t=√2h/g

10=√2h/g

100=2h/g

100 x 9.8=2h

h=100 x 9.8 / 2

=490m……


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Answer 2

ʜᴇʏ ᴍᴀᴛᴇ!!! ʜᴇʀᴇ's ᴜʀ ᴀɴsᴡᴇʀ!!!^_^
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$the \: formula \: for \: the \: time \: \\ of \: flight \: is \: t = \sqrt{ \frac{2h}{g} } \\ (where \: h \: is \: the \: height \: from \: \\ which \: ball \: is \: dropped \: .)$

$t = 10s$

$10= \sqrt{ \frac{2h}{9.8} }(putting \: the \: \\ values \: in \: the \: above \: formula)$

H=490m...

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