Your equation will work on solid objects only and then you have to think about their densities. You can not plug into an equation numbers freely willy and go home happy as a clam. It was an aluminum shell bubble vs steel wall.
Unadulterated horse poop. It would help if you understood
very basic physics.
Which weighs more, 900,000 pounds of airplane or 900,000 pounds of feathers?
It doesn't matter what the airplane was "made of" or how it was made. 900,000 pounds of mass striking the WTC at 500+ mph.
There was no way the aluminum shell could cut through the wall without anything done to that wall prior to the impact or at east during the impact. It would have been pancaked, turned to dust, incinerated, and that at any high speed and above.
It would also help if you understood
very basic building facts. The WTC facade was not a "steel wall." Glass and aluminum. Your Wile E. Coyote fantasy of a fully laden jet airliner "squishing" flat on the otherwise undamaged outer shell of the WTC is, fantasy.
There was no debris coming down the wall. There was no explosion on contact, no fire, the plane was just swallowed. It was swallowed not because of the kinetic energy with which it hit the wall, but because most likely the columns had been undone in the place of impact, not a big deal.
Just to interject some reality into your fantasy, are you actually suggesting the impact site was "pre-weakened?" And the jet moving at 500 mph flew into that very specific spot?
Many truthers claim it was "impossible" for a airliner to hit such a "tiny" target as the entire WTC in the first place. Now you're claiming not only could one hit it, it could pick the
specific impact floors? At 500+ mph?
Notice the angle of the opening? The plane didn't hit horizontally. That would be some amazingly precise "weakening of the walls" to fit that diagonal space.