The football is punted with an initial velocity of 22 meters per second from a height of 1 meter off the ground. When is the football within 5 metes of the ground?

Answer 1

Is the ball punted straight up? If so, then

h = 1+22t-4.9t^2

So, just solve for t when h<=5.

If the ball was kicked at an angle, things get a bit harder, as the equation is then

h = 1 + 22sinθ t - 4.9t^2