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Originally posted by CB_Brooklyn
It violates Newton's 3rd Law of Motion for a plane to penetrate the building like that. Anyone content with believing that the video portrays a real event has seen too many special effect movies. (in other words, brainwashing)
As retired Aerospace Engineer Joseph Kieth says: "The video is phony because airliners don’t meld into steel and concrete buildings, they crash against them!"
Joseph Keith is a retired 76-year-old software engineer who worked in the aerospace industry and just resigned from a professional group known as the Scientific Panel Investigating Nine Eleven (SPINE) founded by Canadian scientist, A.K. (“Kee”) Dewdney. The website is www.physics911.net. Curious about why he resigned (I’m still a SPINE member), I interviewed him from his home in southern California.
Originally posted by CB_Brooklyn
It violates Newton's 3rd Law of Motion for a plane to penetrate the building like that. Anyone content with believing that the video portrays a real event has seen too many special effect movies. (in other words, brainwashing)
Originally posted by mattifikation
A friend of mine once jammed a straw into another guy's arm, penetrating all of the flesh until it struck bone. No damage was done to the straw; no bending, splitting, or creasing. A martial artist can punch through a slab of concrete, and his hand is completely unscathed. No scrapes, no broken bones, nothing. How does a weak object damage a comparatively stronger object and go through it without damaging itself?
There are three factors in play here. The first is compression, which prevents or decreases damage to the weak object. The second is concentration of force - specifically kinetic energy - which allows the weak object to damage the strong object. The third factor is momentum. This is what allows the striking object to continue travelling through its target.
Compression works because it occurs before either object recieves any damage. The instant one object strikes enother, both objects are compressed. In other words, the molecules comprising those objects are forced together. This increases the rigidity of both objects, therefor increasing their strength. The weaker object will benefit much more from compression than the strong object, because it was less rigid to begin with. A straw hits an arm and is not damaged because the impact is actually the source of its strength. A fist hits a slab of concrete and the bones do not break because they are compressed by the impact and become stronger. A plane experiences the same effect. Its molecules are compressed by the impact and it has enough rigidity to hold its strength, at least for a short time until the plane is well on its way into (and partially out the other side of) a building.
As the weak object is gaining strength from compression, concentration of force is where the target object loses its strength. The straw did not merely fall on some poor guys arm, it had the strength of my roommates arm being focused into it. The swinging motion of his arm backed by his muscular strength and focused into a tiny point was enough to break the skin of the person he stabbed with it. The martial artist moves every muscle in his body to strike the piece of cement. All of this movement focuses the strength of his entire body down his arm and into just two knuckles: his first index knuckle and first middle knuckle. With so much force concentrated into just a small part of that "strong" cement, destruction of the target is inevitable. And the jet? The weight of the jet combined with the thrust of the jet engines is focused into the nosecone. Where this nosecone makes initial contact is just a few inches wide - that's a lot of thrust in an area the size of a basketball! This is how the plane smashes its way into the building; it is concentrating its force, the building is not. Had the plane struck a corner, the result might have been quite different.
The third factor, as I said, is momentum. The straw had enough momentum to go through all of the target's flesh until it hit bone, which absorbed the remainder of its kinetic energy and stopped the straw. The fist of the martial artist doesn't merely crack the concrete slab and bounce off, it breaks the whole way through it. Why? Because its momentum is taking it through the target, while the target has gained momentum in a direction which weakens it - half the concrete is going left, half is going right. Result? The fist comes out the other side, in many demonstrations with enough force remaining to take it through several more slabs of concrete. The plane does the same thing! It benefits from its momentum to continue travelling through the building, with a big chunk of it coming out the other side.
I hope this sheds some light on the debate of whether or not a huge jet plane can damage a building by crashing into it at hundreds of miles per hour. For our next debate, we will argue for over half a decade about whether or not an egg will break if you shoot it with an elephant gun.