Friday, August 23, 2013

Why Three Skyscrapers Could Not Fall Like Jenga Blocks on 9/11: Meet Galileo

By "James Madison"

(Note: Jet fuel is only kerosene)


In a remarkable and unprecedented phenomenon of engineering history, we are told that on 9/11 of 2001 the Twin Towers and Building 7 went down at essentially the same speed as a replica made of Jenga blocks would have gone down.  A Jenga block structure has no solid joints, no millions of cross-braces bolted or welded into place, or anything but air between the pieces.  For this reason when a Jenga structure falls down, it falls in seconds to the ground, the pieces falling at the speed of rocks falling from the sky, which is called free-fall acceleration.

Free fall acceleration is the speed at which any object falls through thin air to the ground. It is 10 meters per second, per second.  That means that for every second an object is falling, it is going another 10 meters per second faster.  So a baseball falling for 3 seconds attains the speed of 30 meters per second.  Three seconds later it would be going 60 meters per second.

The widely disseminated theory associated with the official story is that a few floors at the top collapsed, starting a chain reaction in which the collapse of each additional floor made the total mass heavier, and driving it faster and harder toward the ground. This is supposedly why the towers fell at virtual free-fall acceleration (the official NIST report uses the words “essentially in free fall.”) 


However, that theory appears nowhere in the official report on the collapses.  That report is NIST's "Probable Collapse Sequence."  In that report, the government agency only describes how the top floors of each tower might have collapsed.  Rather than acknowledge the 47 five-foot-wide vertical beams, extensive cross-bracing, millions of welds, bolts, rivets, and gusset plates which made up what was considered two of the strongest buildings in the world, the report reads:
"The stories below collapse initiation provided little resistance to the falling upper sections."
This might have come as a surprise to the architects and engineers who designed the towers.  Frank DeMartini, and architect and the on-site construction manager for the WTC, said in January of 2001:
“The building was designed to have a fully loaded 707 crash into it. That was the largest plane at the time. I believe that the building probably could sustain multiple impacts of jetliners because this structure is like the mosquito netting on your screen door—this intense grid—and the jet plane is just a pencil puncturing that screen netting. It really does nothing to the screen netting.”
So confident was DeMartini that the buildings would never collapse that he stayed in South Tower and lost his life saving at least 50 people.

Below is a photo of one of the towers under construction.




The problem with what has spread to become the official theory, through mouthpieces for the government but not the government itself, is that objects which are heavier do not fall faster than objects that are lighter, the unspoken premise of the official story. In a vacuum, even a feather and a bowling ball would fall at the same speed. An object can only go slower than the rate of free fall acceleration, as it meets resistance. This goes back to Galileo. 

 So steel frames offering massive resistance, fires or no fires, cannot fall as fast as Jenga blocks. The reason is simple. Because they are not Jenga blocks.




Think of it another way. Look at the picture below. Which block reaches the ground first? Because on 9/11, they both reached the ground at virtually the same time.  But given the difference in the mediums they are falling through, air versus the path of greatest resistance through construction grade steel, the one on the right should reach the ground first, because there is nothing between it and the ground. On 9/11, the impossible happened and they both reached the ground at the same time.







Below: Windsor Hotel fire, burned 20 hours, steel and concrete construction.  
Didn't collapse. Twin Towers were 100% steel frame construction much stronger. 







Putting the block illustration more scientifically, if the 15 story section is falling at free fall speed, all of its gravitational potential energy is converted to kinetic energy (movement).  It is not available to do the work of "crushing" the building below.  It would have to slow down in order to do any other work, i.e., "crushing" 80,000 tons of structural steel below, and that work quantity would have to be subtracted from kinetic energy, which is speed.  Kinetic energy, and acceleration, can only decrease as resistance is overcome.  It cannot increase.


Jenga blocks fall as they do because the pieces are no force doing work is required to break connections.  The amount of work energy which must be subtracted from kinetic energy is zero. 

These are the irons laws of Newtonian physics.  


To illustrate what happens when a falling mass meets resistance, one only need think back to the old Prell Shampoo commercial of a pearl falling through shampoo.  The pearl sinks slowly through the viscous medium, many times more viscous than air.  Steel is thousands of times more resistant, even at high temperatures, yet we are to believe that a mass would have crushed it at the same speed it would fall through air.  



Object falling through medium denser than air


One self-described physicist maintains that the potential energy of the towers was sufficient to destroy the building.  But potential energy is at equilibrium as a result of another force the writer entirely neglects: resistance.  If resistance were not countering potential energy, all buildings should fall around our ears this moment.  

They do not fall around our ears because, unlike Jenga blocks or dominoes, resistance to fall is bolted and welded in throughout the building's structural members, including extensive cross-bracing and 3-inch thick steel gusset plates, placing the potential energy of the tower in static equilibrium.  Jenga, dominoes, and playing cards have zero resistance between their structural members, which is why they fall when a delicate equilibrium is even slightly upset.


From every direction, including laterally in the event of 200 mph hurricane winds, at maximum load, the Towers were designed to keep standing, as safety factors in high-rise construction are usually 5 - 6 times maximum load in any conceivable circumstances including earthquakes.  

As for the damage from planes and fuel, jetliners are basically hollow, light aluminum tubes, no match for steel. Watch how easily this steel crane demolishes a scrapped jetliner below.




Below is sliced up wreckage from one of the 9/11 airliners. 



Then of course there is Building 7, never even hit by a plane but collapsing just as fast as the towers.


Wrap your mind around this law of physics, proven by Galileo, and you will see that the collapsing mass could not have gone faster as the mass got heavier. Therefore the official explanation for how the towers disappeared so quickly is false.   This why he 9/11 Commission Report does not discuss the total collapse mechanism other than when the top floors started to collapse. There was no possible collapse mechanism except demolition.

Proof that all objects of different weights fall to the ground at the same speed;




Ball and feather race in a vacuum:






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Resources


Important further reading and resources


U.S. Military Officers and Patriots Question 9/11


9/11 Skeptics to Mark Anniversary with Vigils, Lawsuit


Who Did 9/11: Technology of Autopilot/Remote Flight.  Motive, Means, Opportunity


9/11Evidence.org


9/11 Truth Action Project


9/11Research


Pilots for 9/11 Truth


Architects and Engineers for 9/11 Truth


Documentary: 9/11 The New Pearl Harbor




James Madison is a pseudonym in the tradition of the American Revolution's Publius, in order that arguments must be judged solely on the merits.

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