so hmm check the picture below, thus the ball hits 19 feet of height twice, once on the way up, and once on the way down, at about 0.64 seconds and at 1.17 seconds.
Original position was let's say 40 yard line. You must get to the 50 yard line for a first down. Losing 26 1/3 yardage, you are at the 13 2/3 location You would need (36 1/3) to get to the 50 yard line.
