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Physics 9 Online
OpenStudy (anonymous):

A hot-air balloon is ascending at the rate of 10 m/s and is 70 m above the ground when a package is dropped over the side. (a) How long does the package take to reach the ground?

OpenStudy (shamim):

h=ut+.5gt^2

OpenStudy (shamim):

use the above equation n solve it for t

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