I'm not the one who failed to include the resistance capacity of the intact core structure below the upper block into the equation; that was you. You're trying to make a case that it's completely within the realm of possibility that the lower intact core structure had no effect on the speed of the descent of the upper block. You know better. Of course you do.
Now, let's have another go at it.
On the video below, at either the 30 second or 1:12 mark, place a straightedge horizontally across the screen and line it up with the top of the building and then count the seconds it takes for the 360 feet of antenna to pass the marker. It will show that the upper block descends at a rate that is just forty feet shy of freefall. That means that the upper block passed through the core structure as if it weren't there. To be more precise, one structure magically passed through another structure of the exact same composition without so much as a visible jolt.
So how does that happen?
https://www.youtube.com/watch?v=xGAofwkAOlo
What is the maximum load of a WTC floor, typical? Wait, science, engineering, geometry, physics, math are not used to make up the CD claim. Never mind. So, the building starts to fall, and you make a claim with no sources, nothing. Not surprised things on earth accelerate when falling. Yes, the collapse front of one WTC tower took 12.08 seconds or longer to reach the ground floor, slower than freefall. This 12 seconds is not a surprize, and is exactly what momentum conservation shows, as each floor fails. Simple physics, no need for explosives, gravity alone accounts for the speed and acceleration of collapse.
The antenna is not perpendicular or in the z-plane when falling, it is tilting; thus your fake numbers don't add up. You forgot geometry, or you plagiarized the claim from 9/11 truth. You can't even check if I got the energy due to gravity released during collapse from gravity, >100 tons of TNT, over 423,000,000,000 joules.
The initial collapse acceleration is less than g, less than 9.81 m/s, it is physics. This is not evidence for anything but fire caused the collapse, and proof of gravity.
I can get things to fall faster than freefall/g... anyone can
https://www.youtube.com/watch?v=BV7TPvk__kE
https://www.youtube.com/watch?v=X-QFAB0gEtE
WTC 7 was internally collapsing many seconds before the roofline falls, it could be like the chain, and explain the 2 or so seconds near g. 9/11 truth can't use physics, they use hearsay, lies and opinions, based on zero evidence. 9/11 truth claims are science free opinions, if 9/11 truth used science, 9/11 truth would vaporize faster than freefall.