Question 1061428
{{{ v = sqrt( 2*g*h ) }}}
{{{ v = 80 }}} ft/sec
{{{ g = 32 }}} ft/sec2 
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{{{ 80 = sqrt( 2*32*h ) }}}
square both sides
{{{ 6400 = 2*32*h }}}
{{{ 64h = 6400 }}}
{{{ h = 100 }}}
the object has fallen 100 ft