Six balls are thrown from the top of a building. Two balls are dropped from rest, two are thrown downward with a velocity of 10 m/s and two are thrown upward with a velocity of 10 m/s. Each ball has a differing mass as well, such as the two balls thrown from rest, one has a smaller mass than the other and the same goes for the other three categories. I'm trying to order the balls from greatest to least velocity and acceleration from when they hit the ground. What I'm confused on is that I thought they would all have the same velocity and acceleration when they hit the ground? When I spoke to my teacher he told me there was a definite order but I remember learning in class that all objects would have the same velocity and acceleration when they hit the ground if they were thrown at the same time, regardless if they were dropped, thrown down or thrown up. Does it have something to do with the differing masses?