Suppose you altered your existing ramp so that the marbles had twice their initial velocity right before leaving the ramp. How would this change the total distance traveled and the time that the marbles were in the air? Does this mean the velocity will double because the ramp is longer, which means the speed is greater which means the it will stay in the air less?

If you were to fire a paintball pellet horizontally and at the same time drop the same type of paintball pellet you fired from the paintball gun, which pellet would hit the ground first and why is this so?

Same time? Start at 0 v, and fall at 9.81ms^2?