Homework Help: Physics

Posted by lisa on Tuesday, September 21, 2010 at 2:06pm.

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?

Physics - bobpursley, Tuesday, September 21, 2010 at 2:11pm
how long does it take an object to fall 160 m?
Physics - lisa, Tuesday, September 21, 2010 at 2:24pm
Bobpursley -- I do not understand. The answer was 5.7 s and I have no idea what equation was used to get that.
Physics - Matthew, Wednesday, February 9, 2011 at 7:21pm
y = .5gt^2

160 = .5gt^2

= 5.71s

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