Question 171653
According to the 1998 Guinness Book of World Records stuntman Dan Koko fell a distance of 365 feet into an airbag after jumping from the Vegas World Hotel and Casino. The distance d in feet traveled by a freefalling object in t seconds is given by the formula d = 16t 2. To the nearest tenth of a second, how long did the stuntman's freefall last? 
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{{{d = 16t^2}}} Ignoring wind resistance and using 32ft/sec/sec as acceleration due to gravity.
{{{365 = 16t^2}}}
{{{t^2 = 365/16}}}
{{{t = sqrt(365/16)}}}
{{{t = sqrt(365)/4}}}
t =~ 4.8 seconds
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His speed at impact was 32t, = 153 ft/sec = 104 mph