Question 674557
The velocity v (in feet per second) of an object dropped from tall building after falling d feet is given by the mathematical model v = . What is the velocity of an object that has fallen 121 feet?
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v = a*t where a is gravitational acceleration ~ 32 ft/sec/sec
s = at^2/2  (s = distance in ft)
{{{t = sqrt(2s/a)}}}
{{{v = at = 32sqrt(2s/32)}}}
{{{v = 32*sqrt(121/16) = 32*11/4}}}
v = 88 ft/sec