Question 310938
A pine cone falls from a tree branch that is 144 feet above the ground. After how many seconds does the pine cone land on the  ground ?

{{{distance = 16time^2}}}

{{{144 = 16t^2}}}

{{{144/16 = 16t^2/16}}}

{{{9 = t^2}}}

{{{3 = t}}}

3 seconds.