Really? Got news for you, dude, your definition of free fall speed is completely erroneous. There are many factors that determine precisely what the free fall speed of a given object is. The idea that WTC7 fell at free fall speed is ludicrous. It did no such thing. Neither did the two towers.

With a 30 year career as a skydiver, I am quite familiar with free fall speeds, terminal velocities, and gravitational forces. Just so you know, gravitational force imparts an acceleration on a physical object. For instance, on an normal jump (from 15,000AGL or less) a skydiver in a flat, face to earth position will accelerate for about 10 seconds from zero vertical speed to an average of 120 mph when air pressure (resistance) equalizes the speed of descent--known as terminal velocity. Naturally air density is one factor in determining this, as is the area of resistance and the distance from the body generating the gravitational field. Look up the names Felix Baumgartner and Alan Eustace for info on the extremes.

There is no way anyone can define the speeds at which WTC7 or towers 1 & 2 fell as free fall speeds. However, in that feeble mind of yours, free fall speed can be anything you want it to be. Just make something up to fit your agenda. That's how you do it, right?