A punter kicks a football upward with an initial speed of 48 feet per second. After how many seconds does the ball hit the ground? Use the formula h = rt − 16t2 where h represents height in feet and r represents the initial speed. Numerical Answers Expected!
Substituting the given information into the formula gives 0 = 48t - 16t² Factoring, this becomes 0 = 16t(3-t) The ball is at ground level when t=0 or t=3.
