6) Two balls, identical except for color, are thrown horizontally from the roof of a tall building at the same instant. The initial speed of the red ball is twice the initial speed of the blue ball. Ignoring air resistance, a) the red ball reaches the ground first. b) the blue ball reaches the ground first. c) both balls land at the same instant with different speeds. d) both balls land at the same instant with the same speed.

6) Two balls, identical except for color, are thrown horizontally from the roof of a tall building at the same instant. The initial speed of the red ball is twice the initial speed of the blue ball. Ignoring air resistance, a) the red ball reaches the ground first. b) the blue ball reaches the ground first. c) both balls land at the same instant with different speeds. d) both balls land at the same instant with the same speed.