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9/11 Commission Report Fails
High School Physics Test
http://9eleven.info
Monday November 19, 2007
When I talk to people about the building collapses on 9/11/2001,
most people have never even heard about the destruction of World
Trade Center Building No. 7, the 47 story steel office tower that
fell into its own footprint at 5:20 on the evening of 9/11. But
even people who know about building 7 will indicate that they
don’t feel competent to have an opinion about the plausibility
of the official explanation for the twin towers collapse. They
will say things like “I’m not a structural engineer.”
or “I’m no architect.”
I contend that you don’t have to be a structural engineer
or architect to see that the official story, to the extent that
there is one, is strictly impossible. Even knowledge of basic
High School physics is enough to prove that the official explanation
can not be squared with the rapidity of collapse or the plumes
of concrete dust observed on 9/11.
Newton’s law of gravity tells us exactly what to expect
from falling bodies. A falling object experiences a constant acceleration
of 32ft/sec^2. We can calculate that the time it would take for
an object to fall from the top of one of the 1350ft WTC towers
is 9.2 seconds without accounting for air resistance. When air
resistance is included, for example, for a brick falling from
that height, we would expect it to take about 12 sec. This is
very close to the approximately 10 seconds it took for the towers
to fall as reported in the official Kean-Hammilton-Zelikow report
or the 10 to 13 seconds as independently measured from observation
of various videos of the collapses. The bottom line is that the
towers fell at essentially free fall speed.
(Article continues below)
Another fundamental law of physics is the conservation of energy
and it applies to falling bodies as well. An object, as it falls,
converts its gravitational potential energy (due to height above
ground) into kinetic energy (speed). If that object has to use
some of its energy for something else, like pushing air out of
the way, then there will be less energy available as kinetic energy
so it will take a bit longer to reach the ground. As we’ve
seen in the example of a brick falling from the top of the tower,
even just the energy required to move air out of the way is enough
to slow the free fall time from 9.2 seconds to 12 seconds.
In the “official” explanation of the collapse, the
so-called “pancake theory”, the floor above gives
way and crashes into the floor below it, which gives way and together
they fall on the next floor below, and so on. The falling floor
must use a considerable amount of its energy to break loose the
floor below. In addition, to account for the observed dust plumes,
the crashing together of the floors has to crush the concrete
floor slabs into a fine powder and that takes a very substantial
amount of energy as well. Additional energy is then required to
eject those tons of crushed concrete at high speed in all directions
because that’s what was observed on 9/11. All of this energy
must be subtracted from the original potential energy of the falling
floor, which means there is much less energy available as kinetic
energy(speed) so the floors must be falling much slower than they
would otherwise.
How much slower? You don’t have to be an engineer to realize
that the energy required to crush the concrete into fine powder
and blow it out of the buildings at high speed is many times more
energy than what is required just to move air out of the way.
If the energy required to move air out of the way of a falling
brick could increase the fall time from 9.2 sec. to 12 sec, the
requirement to not only move air, but also crush concrete, and
eject tons of crushed concrete dust laterally at high speed, should
have increased the fall time considerably.
The fact that the buildings were observed to fall at essentially
free fall speed, means that all of the gravitational potential
energy of the building was in fact converted to the kinetic energy
of falling. The fall speed accounts for all of the gravitational
potential energy available. There is no gravitational energy available
to break steel, crush concrete, eject dust or do anything else
but just fall.
The Conservation of Energy Law forces us to conclude that there
had to be some additional source of energy. Some source of energy
to pulverize the concrete and send it in all directions at high
speed as a fine powder. Some additional energy to knock out the
heavy steel beams that had supported the building for 40 years
so that the top of the building could free fall unimpeded to the
ground in just over 10 seconds.
What was the source of the additional energy? Since the 9/11
commission neglected to investigate the mater, that has been left
to your imagination, but large quantities of high grade explosives
fit the bill.
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