science
posted by lekshmi
a stone is thrown vertically upward,went up 98m and came down.How long was it in air?

bobpursley
I suspect it was twice as long as it took to fall 98m.
time to fall 98m
98=1/2 g t^2
t= sqrt(2*98/9.8)
so double that, and you have it.
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