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Decelerating Jet

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Decelerating Jet

A jet is traveling at a speed of 250
m
s
, and is decelerating at a rate of 2
m
s2
.  The jet maintains a constant height of 10,000 meters.

Someone has marked an X on the ground 15000 meters ahead of the jet's current location.

If cargo is to be dropped in order to land exactly on the X, and we assume no air/wind resistance, how many seconds should they wait before dropping the cargo?

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Problem by malimil

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