7. As part of a pre-match entertainment at the football grand final, Jill was parachuting towards the football ground at the constant velocity of 9.8 m s. When she was 73.5 m above the ground, Jill let o a football directly above the center of the playing field. a. At what speed does the football strike the ground? 39.2 m s- b. What was the time difference between the ball landing and Jill landing? S-D/T 73.5/9. 4.5 s