I would try using the drag equation to determine the force on the ball. You have the capability to vary air speed, which would change the drag.
I think the hard part you would have trying to do this would be to characterize the air velocity as a function of distance from the source and angle from the axis of the source. If you assumed the air velocity was constant along the axis, then congratulations - you made a blowgun.
I think you would have so much difficulty that you would be better if trying to determine the air velocity - height relationship empirically and then trying to fit a curve to that data.
You could even take those empirical results, use the drag equation, and see if that will give you wind speed by distance.