NIST and the timing of the collapse of WTC 7 Jul 20, 2009 8:42:53 GMT -4
Post by rodin on Jul 20, 2009 8:42:53 GMT -4
On top of this we really can't say how close to free fall the collapse was (note that free fall is an acceleration, not a speed or a velocity) because we don't have any film that records the end of the collapse. We can guess, and our guess is that it was close to what an object in free fall would have taken, but not exactly, and when you have any delay, no matter how small, then you have resistance.
The question you need to find the answer to is how much resistance woulkd the columns have created before the joints failed. While I am sure we have a few people here that could tell you exactly how to do that, I'd suggest that the answer is going to be in the ms, and over 40 stories that only adds up to a fraction of a second, something almost impossible to measure from the videos.
You know I am beginning to think you are spinning a line not seeking truth. The observed wall in the video I used showed no appreciable sideways movement in the plane of observation (along the edge of the building). Furthermore I was able to observe substantially more than 330 feet falling down at freefall speed with no buckling.
Of course I know g is an acceleration of 32 feet sec-2. It is not necessary to see the final part of the collapse to determine if free-fall was a measurable element of the collapse. I think you know this, and therefore your comment...
we really can't say how close to free fall the collapse was (note that free fall is an acceleration, not a speed or a velocity) because we don't have any film that records the end of the collapse.
...is made either from a lack of quality analytical thinking, or you are promoting a lie.