Hey guys, I'm new here and need some help with a physics homework question. Two students stand on top of a building of height (h). One throws a ball straight upward at the same speed as the other student who simultaneously throws a ball straight downward toward the ground. Which of the following must be true? Here is what I think is right so far, but I would like to double check to make sure. a) The balls hit the ground at the same time. - False b) The ball thrown downward hits the ground first. - True c) The balls hit the ground at the same speed. - True d) After both balls leave the hand, the ball thrown downward has a larger acceleration than that thrown upward. - False e) The ball thrown downward hits the ground before the ball thrown upward reaches its peak. - Ans. Unsure, because I'm confused on this. Doesn't it depend on the height and initial speed? Which isn't given in the problem. f) None of the above. - False Again, I'm not sure if any of my answers are correct and I need some help to double check. Thanks for any help in advance.