Posted by George on Sunday, January 27, 2013 at 4:23pm.
h=gt²/2
h = (1/2) g t^2
= .5 * 9.81 *4.1^2
= 82.45 m
check
how long to fall from 82.4 m
82.45 = (1/2) (9.81) t^2
t = 4.1 s check
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