If one ball was thrown down with an initial velocity and another ball was thrown up with the same initial velocity. a) Which would have greater speed when it reaches the ground? b)Which has a greater displacement? c) Which ball will hit the ground first? d) Which travelled a greater distance? I think they would hit the ground at the same time since they have the same acceleration due to gravity. I'm not sure but I think they have the same displacement and the ball that was thrown up has a greater distance travelled. Can someone please explain each of these questions?