Merged Freefall is not evidence for Controlled Demolition

[jaydeehess]

No, the resistance can also countered by an additional pulling force - the interior collapse pulling the exterior down. Try again.

Yep, not everything is simple Newtonian point mass systems. There shouldn't be a physicist or engineer in the world who doesn't understand that. Alas, some are, counter intuitively, dumber than dirt.

Your statement above is quite well demonstrated by this:

http://inspiringscience.net/2013/04/15/falling-faster-than-gravity/

This is, imho a simplified lab demonstration of the factor involved in the excursions above g in the collapse of WTC 7.

 

[JSanderO]

The columns and transfers structures ending at floor 7/8 collapsed and pulled in the perimeter structure underneath the exterior columns of the moment frame... essentially leaving the moment frame with no support "suspended" in mid air as it were. The last columns supporting the moment frame were at the NW corner and the entire trapazoid dropped and rotated.

 

[beachnut]

Freefall acceleration is evidence of zero resistance to the force of gravity.

CD creates the necessary conditions for freefall acceleration to occur.

Thus the interior which collapsed first is gone, and there is "zero resistance" to gravity, or the interior is pulling down the facade with it, and the interior was falling for many seconds prior.

Darn, no CD, no sounds of explosives, no damage by thermite. The CD claim is based on no evidence, thus CD is a fantasy version of 9/11. Big failure, 14 years of no evidence.

https://www.youtube.com/watch?v=fu7M1A3ZKmU

BTW, the 9/11 truth followers who say the visual presentation of an engineering model does not look like the actual collapse, have no clue what engineering and mathematical models are, revealing an overwhelming ignorance of models.

 

[jaydeehess]

The columns and transfers structures ending at floor 7/8 collapsed and pulled in the perimeter structure underneath the exterior columns of the moment frame... essentially leaving the moment frame with no support "suspended" in mid air as it were. The last columns supporting the moment frame were at the NW corner and the entire trapazoid dropped and rotated.

Well some people would expect it to remain suspended in mid air until the building looked down

 

[ozeco41]

Freefall acceleration is evidence of zero resistance to the force of gravity.

(a) Zero NET resistance and (b) for the isolated sub-system being considered.

Both criteria needed to remove the mendacious reliance on ambiguity.

CD creates may create the necessary conditions for freefall acceleration to occur.

Both the global claim "creates" and the implied exclusive that only CD does so are false.

Both criteria need correcting to remove the mendacious reliance on ambiguity.

 

[Dave Rogers]

Both the global claim "creates" and the implied exclusive that only CD does so are false.

Both criteria need correcting to remove the mendacious reliance on ambiguity.

I think this is the central point of the whole thread. Put more simply, CD may or may not result in some part of a building falling at freefall acceleration, and other causes of collapse also may or may not result in some part of a building falling at freefall acceleration. Freefall acceleration is therefore neither an indication of, nor a contraindication of, CD, and the equation CD=freefall is purely an invention of the truth movement.

Dave

 

[ozeco41]

I think this is the central point of the whole thread.

Yes.

Put more simply, CD may or may not result in some part of a building falling at freefall acceleration, and other causes of collapse also may or may not result in some part of a building falling at freefall acceleration. Freefall acceleration is therefore neither an indication of, nor a contraindication of, CD, and the equation CD=freefall is purely an invention of the truth movement.

Dave

If that is "put more simply" then "that is what I meant to say"

Joking aside - I was deliberately commenting within the structure of Criteria's mendacious nonsense.

It is well past the time when all members - both sides - started to recognise that "free fall" is an artefact of a collapse mechanism. NOT what started the mechanism.

AND CD is only one of the alternate ways of starting a collapse mechanism.

But I'm happy to stay with your simpler version.

 

[JSanderO]

The CD nonsense is driven by the notion that free fall means that there is no resistance and structures should not be able to naturally clear the resisting parts. But this is clearly false... There are multiple ways that the axial paths can be broken and resistance destroyed and FF made possible.

 

[jaydeehess]

The CD nonsense is driven by the notion that free fall means that there is no resistance and structures should not be able to naturally clear the resisting parts. But this is clearly false... There are multiple ways that the axial paths can be broken and resistance destroyed and FF made possible.

Indeed, while Chandler states in his article on AE911T's site, that every single column across the width and breadth , and over 8 floors, of WTC 7 had to be simultaneously removed, TSz says "only" the interior columns over 8 floors will lead to free fall.

Clearly TSz acknowledges that "there are multiple ways that the axial paths can be broken and resistance destroyed", at least for the exterior columns.

 

[Dave Rogers]

Indeed, while Chandler states in his article on AE911T's site, that every single column across the width and breadth , and over 8 floors, of WTC 7 had to be simultaneously removed, TSz says "only" the interior columns over 8 floors will lead to free fall.

Clearly TSz acknowledges that "there are multiple ways that the axial paths can be broken and resistance destroyed", at least for the exterior columns.

Except in WTC1 and 2, for some reason, where even though the corners were blown up the perimeter still provided significant resistance. Yes, he's said that.

Dave

 

[Axxman300]

Evidence of CD = Loud explosions:

https://www.youtube.com/watch?v=eem7d58gjno

Nothing like this on 9-11.

 

[zooterkin]

Several off topic posts moved to AAH.

Please keep to the topic of the thread, which is not each other. Thank you!

Replying to this modbox in thread will be off topic  Posted By: zooterkin

 

[Criteria]

The columns and transfers structures ending at floor 7/8 collapsed and pulled in the perimeter structure underneath the exterior columns of the moment frame... essentially leaving the moment frame with no support "suspended" in mid air as it were.

The last columns supporting the moment frame were at the NW corner and the entire trapazoid dropped and rotated.

To translate, without bothering to seriously consider how, you speculate that initially the “columns and transfer structures” for the first 8 stories of the WTC7 just — collapsed.

In so doing, you imagine that the perimeter was “pulled in”.

With the perimeter for those 8 stories effectively removed, you suggest that when “the last columns supporting“ WTC7’s trapezoidal outside shell at the NW corner failed, then, “the entire trapezoid dropped..”

- You fail to explain what orchestrated the massive structural failure for the first 8 stories of WTC7.

- You fail to explain how it was possible for that huge trapezoidal structure to remain so level when its only remaining support came from ‘the last columns” in the NW corner.

If you progressively eat away at 8 stories of vertical support from east to west, would a 47 story office tower not at some point start leaning to the east and eventually topple in that direction?

 

[beachnut]

...

- You fail to e ...

- You fail to e...

... topple in that direction?

You offer no evidence for your fantasy version of 9/11. Knowledge about fire and structural engineering are not in 9/11 truth bag of tricks, but fantasy, lies and idiotic opinions are.

You failed to come up with an alternative to NIST or other engineers who say it was fire. Big fail, as there is zero evidence for the failed fantasy of the inside job, zero credibility after proclaiming Balsamo an aviation authority.

Is your fantasy CD, silent explosives, or no product thermite? Got evidence yet? No.

It goes together, the big logic of 9/11 truth boils down to the usual fantasy stuff - unable to figure out what hit the Pentagon, no clue fire caused 7 WTC collapse. The only logic in 9/11 truth, more woo based on more woo.

 

[Criteria]

Evidence of CD = Loud explosions:

https://www.youtube.com/watch?v=eem7d58gjno

Nothing like this on 9-11.

Certainly the sonic dissimilarity between Hollywood feature film sound and real-world recorded sound is obvious in that controlled demolition compilation video.

Even so, the compilation video of building demolitions you linked to reveals a number of important things.

The most significant revelation from those videos is that the loudest and clearest recordings of explosions came from building demolitions where the camera’s microphone is well positioned and faces an unobstructed view of the demolition. Additionally, all those building demolitions followed safety protocols that not only reduced the danger to the building’s surroundings, but also maximized sound projection.

There are significant differences between those engineered collapses and the engineered collapse suffered by WTC7;

WTC7 was prepped to be a surprise demolition and therefore in the interest of stealth, none of the usual building safety and engineering efficiency protocols could be followed.

WTC7 did not have all of its ‘sound suppressing’ windows and doors removed.

WTC7 did not have its ‘sound absorbing’ fixtures and loosely attached interior components removed.

The north side cameras that recorded the sounds from WTC7’s collapse, had obstructed views of WTC7.

The explosions behind the lower floor implosion in WTC7 were shielded from camera view by foreground buildings and the large amount of cordoned off space surrounding WTC7.

Anyone working in a modern office tower knows how well those sealed windows suppress the sound from outside. Likewise, people on the street cannot hear what is happening inside.

The majority of sealed windows on the north and west faces of WTC7 were not broken until the global collapse of WTC7.

Eye witnesses claimed they heard explosions.

 

[DGM]

Eye witnesses claimed they heard explosions.

Tony refuses to support his theory of explosives over 8 stories with an estimate of how many, do you care to tackle this inconvenient question?

Basically, your claim is hundreds of charges were not recorded because the microphone was not pointed the right way.

 

[Spanx]

Eye witnesses claimed they heard explosions.

Shouldn't this be, Eye witnesses saw no explosions but they heard noises which sounded like explosions.

 

[beachnut]

the fantasy of sound suppression... excuses for a failed fantasy

... Eye witnesses claimed they heard explosions.

Are you using simile for evidence of a fantasy.

The fantasy of CD, 14 years of ignorance and paranoia for 9/11 truth.

 

[Andy_Ross]

Are you saying that glass windows would suppress the sound of high explosive charges?

 

[Axxman300]

Are you saying that glass windows would suppress the sound of high explosive charges?

Yes, that's what he said. Sound is magic.