Thanks jacob1. If we have the values for just one particle, we could work it out. (If we equated drag values to force, and also only if every particle fell the same way without a drag value)
each particle has different air values (how much they drag air behind, how much air slows them down, how much velocity they lose a frame), so I guess this will only be for STNE. I can check what it's exact values are later sometime.
@ T-bolt: When you say that, do you mean initialy, or are you refering to it's acceleration?
that means it falls at a rate of 15.698144 pixels per second
It was at 60.94 Thanks I didn't think to use that
i meant one frame, not one pixel
do you calculate one pixel as one sec? if you dont, then at how many fps was it when you dropped the stone?