ball 1 is thrown into the air and it follows the trajectory for projectile motion shown in the drawing. at the instant that ball 1 is at the top of its trajectory, ball 2 is dropped from rest from the same height. which ball reaches the ground first? (a) ball 1 reaches the ground first, since it is moving at the top of the trajectory, while ball 2 is dropped from rest. (b) ball 2 reaches the ground first, because it has the shorter distance to travel. (c) both balls reach the ground at the same time. (d) there is not enough information to tell which ball reaches the ground first.