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In their final report, issued November 20, 2008, the NIST report's authors stated they had made a more detailed examination, and found a 2.25-second period in which the center roofline exhibited a "free-fall drop for approximately 8 stories.
...the significance is that during that period of free-fall, all of the gravitational energy (also known as potential energy) is being converted into energy of motion (also known as kinetic energy). There is no energy available for doing other work, such as breaking up structural columns, or causing structural pieces to be hurled out of the way.
Originally posted by Big Unit
reply to post by P1DrummerBoy
The questions have already been answered. Unfortunately, in truther fashion, the OP wont find them.
Originally posted by jprophet420
This is very important information they present. The debate has moved along from there was absolutely no freefall vs it was freefall, to NIST admitting there was freefall. This is HUGE. If I believed the OS I would be calling up NIST and DEMANDING they revise. The OS is FALSE if no once can show the math on this.
Originally posted by exponent
What math would you like? A portion being freefall is quite different to the entirety of the collapse being freefall. I don't see that this is a huge problem for the 'official story' as the WTC7 report detailed how the building collapsed and we know the internal frame was collapsing before we had originally suspected.
Originally posted by Valhall
Depends on whether you're saying the frame was collapsing before you thought it was, or it was disintegrating into nonresistant nothingness before you thought it was.
It kind of makes a big difference. You have to keep in mind the frame is not independent of the visible facade...not even part of it.
Originally posted by exponent
This doesn't make sense, NISTs collapse mechanism is an initial progressive collapse around the area of column 79 followed by a lower level failure which became progressive. As far as I am aware, the period where no resistance is claimed, is 8-9 seconds after the start of collapse. "Freefall" is only evidence of demolition if it occurs for long enough that the energy to damage columns could not come from resistance by the structural frame. In this case that does not happen, the building attains freefall acceleration for a very short period in the collapse, and for the rest of the collapse there is obviously a resistive force.
What exactly is the controversy?
con⋅tro⋅ver⋅sy
/ˈkɒntrəˌvɜrsi; Brit. also kənˈtrɒvərsi/ Show Spelled Pronunciation [kon-truh-vur-see; Brit. also kuhn-trov-er-see] Show IPA
–noun, plural -sies.
1. a prolonged public dispute, debate, or contention; disputation concerning a matter of opinion.
2. contention, strife, or argument.
beat a dead horse.
Part I in a series debunking conspiracy theories about the collapse. Focus on David Chandler's faulty observations, proving him wrong. Pass on to your skeptic friends. Shine a light on the truth.
Originally posted by Big Unit
reply to post by P1DrummerBoy
The questions have already been answered. Unfortunately, in truther fashion, the OP wont find them.