Asked by lisa

Can someone help me to understand how to work out this problem?

The pilot of an airplane traveling 240 km/h wants to drop supplies to flood victims isolated on a patch of land 160 m below. The supplies should be dropped how many seconds before the plane is directly overhead?

Answers

Answered by bobpursley
how long does it take an object to fall 160 m?
Answered by lisa
Bobpursley -- I do not understand. The answer was 5.7 s and I have no idea what equation was used to get that.
Answered by Matthew
y = .5gt^2

160 = .5gt^2

= 5.71s
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