Physics
posted by Rachael .
A football is punted up into the air and it lands 5 seconds later. How high did the did the football reach it's highest point and when does it reach this height?

Physics 
Henry
t(up) = t(dn) = 5/2 = 2.5s.
Vf = Vo + gt,
Vo = Vf  gt,
Vo = 0  (9.8)*2.5 = 24.5m/s.
h = (Vf^2  Vo^2) / 2g,
h = (0  (24.5)^2 / 19.6 = 30.6m.
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