Here is the problem that I am having trouble with (It probably is a no brainer, but i am a bit rusty- not a bit actually, a lot!). Here is the question: A student stands at the top of a building to perform a kinematics experiment. He throws a red ball directly upwards with an initial speed (Vo). At the same time, he throws a blue ball directly downwards with the same initial speed (Vo). Neglecting air resistance, which of the following statements are true regarding each of the balls, just before they reach the ground? a) The speed of the blue ball is greater than that of the red ball. b) The speed of the red ball is greater than that of the blue ball. b) The two balls have the same velocity. d) The blue ball has a greater acceleration than the red ball. I think the answer is a) because since the blue ball is higher than the red ball when it is descending, the blue ball will be affected by the acceleration due to gravity for a longer period of time therefore right before it hits the ground it will have a higher speed. But what I am skeptical about is the last part of the question where it says just before they hit the ground, does that mean they both meet at a given time before they hit the ground or is it talking about each seperately? Because i am assuming that the red ball will hit the ground before the blue ball. any ideas? thanks in advance! - Mohammed.