DJFullMasthead 911truthnc.org

Tuesday, January 16, 2007

Truth Kit

just cold, hard science and reason.

Gravity:
....The first shows that, "...the explanations of the collapse that have been given by the 9/11 Commission Report and NIST are not physically possible."
Impossible must be taken in its most literal sense here:

From the rooftop of WTC1, drop one dark blue billiard ball over the edge. As it falls, it accelerates. If it were in a vacuum, it would hit the pavement, 1368 feet below, in 9.22 seconds, shown by the blue curve in the figure 1, below. It will take longer if air resistance is considered, but for simplicity, we'll neglect air resistance. This means that the calculated collapse times are more generous to the official story than they need to be.

Figure 1. Minimum Time for a Billiard Ball dropped from the roof of WTC1 to hit the pavement below, assuming no air resistance:
http://i18.photobucket.com/albums/b108/janedoe444/911/WTC-A5-75.jpg
Notice that the billiard ball begins to drop very slowly, then accelerates with the pull of gravity. If in a vacuum, the blue ball will hit the pavement, 1368 ft. below, 9.22 seconds after it is dropped. That is, unless it is propelled by explosives, it will take at least 9.22 seconds to reach the ground (assuming no air resistance).

According to the pancake theory, one floor fails and falls onto the floor below, causing it to fail and fall on the floor below that one, and so forth. The "pancake theory" implies that this continues all the way to the ground floor. In the case of both WTC towers, we didn't see the floors piled up when the event was all over, but rather a pulverization of the floors throughout the event. (see pictures below) So, clearly we cannot assume that the floors stacked up like pancakes. Looking at the data, we take the conservative approach that a falling floor initiates the fall of the one below, while itself becoming pulverized. In other words, when one floor impacts another, the small amount of kinetic energy from the falling floor is consumed (a) by pulverizing the the floor and (b) by breaking free the next floor. In reality, there isn't enough kinetic energy to do either.
[Trumpman][Hoffman]
http://911research.wtc7.net/papers/trumpman/CoreAnalysisFinal.htm
http://911research.wtc7.net/papers/dustvolume/index.html
But, for the sake of evaluating the "collapse" time, we'll assume there was. After all, millions of people believe they saw the buildings "collapse."

continued

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