Question 206100: 20. A punter can kick a football with an initial velocity of 48 feet per second. How many seconds will it take for the ball to return to the ground? (Hint: use the formula h= vt – 16t2.)
Answer by ankor@dixie-net.com(22740)   (Show Source):
You can put this solution on YOUR website! 0. A punter can kick a football with an initial velocity of 48 feet per second.
How many seconds will it take for the ball to return to the ground? (Hint: use the formula h= vt – 16t2.)
:
h = 0 when it hits the ground, therefore:
-16t^2 + 48t = 0
:
Factor out -16t
-16t(t + 3) = 0
:
Two solutions
t = 0, when it begins it's upward journey
and
t = 3 sec, when it returns to earth
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