(Part1) 911 Simple Physics Structural Failure Vs Demolition

(Part 2): http://www.youtube.com/watch?v=ecmQegzMJQE

The mathematical formulas used here are not the proper way for obtaining a real figure but they are based on assumptions in order to obtain a value fore the absolute minimum time needed for the collapse process.

the Assumptions are:
* That the intact structure below the impact zone will not arrest the falling structure above it and will allow it to continue the collapse.

* That the intact structure below the impact zone will behave like a fluid allowing the falling structure above it to flow through it but only providing it with an average resistance force equal to the weight above the crumbling zone at any instant... (this is a reasonable assumption because the structure is designed to support the static load of the weight above it at any point throughout the length of the building so it will provide at least that force before it gives up or breaks)
obviosly the real resistance force from the intact structure below will be alot more until it passes the elastic region and the plastic deformation then fructure but this calculation can give us the absolute minimum time needed.

The proper way to do this is to use strain energy methods and you will find that the collapse will be arrested and not allowed to continue.

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[shorty40merza]

@ryannewman4life1 pancake is a more sophesticated word than the phrase " you might as call yourself"

[KDanagger]

You can't convince people who are ignorant of physics by using physics as your argument.

People who are unfamiliar with the scientific method are easily swayed by emotional manipulation. Nothing new here - these techniques have been used to discredit scientific evidence for centuries when it challenges the status quo.

It's unfortunate, but for many people hate and fear will always trump rational, objective thinking. The individual who truly thinks for themselves is a rare bird in today's world.

[Alaskaslim]

@Alaskaslim

We do NOT know the moment a plane goes off course, as NORAD is NOT given civilian flight plans unless it's relevant to what they're doing. A Plane could be flying circles around in the mid-west, and they wouldn't notice UNLESS the FAA tells them.

The FAA has those records, so if they notice something is up, they try FIRST to handle it THEMSELVES, and only after several minutes of going over the situation do they contact NORAD.

And that's exactly what they did on 9/11.

[Alaskaslim]

@718SOLID

"the fact of the matter is they didn't do their job"

Wrong, you assume NORAD can respond to any event within minutes, that's is COMPLETELY wrong.

NORAD was designed to counter EXTERNAL threats, Soviet Bombers on the horizon, thus there are engagements zones up and down our coasts.

INTERNALLY, it's quite different, there are GAPS in our radar detection, called Class G Airspace, and EVERY plane that takes off within the U.S. is given "FBO" designation "Friendly by origin".

[Alaskaslim]

@718SOLID

"because it takes a genius to see 4 planes go off of their original flight path "

They do not notice right away.

I do NOT care what you've heard or think on this, Air Traffic control manages 1,000s of aircraft, with computer systems largely built in the 1980s.

Each controller is given a set of aircraft to watch, but they CAN and HAVE lost track.

Ever wonder why a plane can crash, and they don't send people out to look for them until the NEXT DAY?

[718SOLID]

@Alaskaslim Oh I'm sorry i didn't realize you were an aviation expert. Yes because it takes a genius to see 4 planes go off of their original flight path and then take your sweet time to respond, yea that's very hard. I can care less how many times they avoided a plane crash because the fact of the matter is they didn't do their job when the biggest attack on America was taking place, no excuse. Why should I do better? its not my job, there is no reason why a jet cant get to NYC

[Alaskaslim]

@Alaskaslim

"6mins to respond is far too long "

Yeah, let's see YOU do better asshole.

Did you know no less than TWO aircraft have crashed into the White House?

Did you know in 2002, a THIRD one could have, as NORAD did NOT arrive in time to stop it?

IT"S NOT AS EASY AS YOU F*CKING THINK.

If you don't know how aviation works, or he difficulties involved, you have NO RIGHT to criticize. You're a man off the street, your "opinion" is noted, but it's uniformed, and flawed.

[718SOLID]

@Alaskaslim Couldn't get there in time? there is a base maybe a couple hundred miles from the WTC and an f-15 can't make it? Whats the point of having them? Were they stopping for donuts or something? I must say we have some great Air force that couldn't stop the biggest attack on America, NORAD may have responded but they took forever and that is not right, that doesn't just happen, especially when they are PREPARED for this exact situation...6mins to respond is far too long

[718SOLID]

@718SOLID Thanks for the grammar lesson, and there are multiple times were the bush administration gave a line of crap that doesn't even match what was put in the official 9/11 report.

[Alaskaslim]

@718SOLID

"NORAD not responding to the hijacked planes"

NORAD responded, they just couldn't get there in time.

I can show you ATC records that recorded their response, AND interviews of the pilots themselves, like to see them?

[Redrover8431]

@718SOLID By the way it's stories not story's