RaptorBites, on 28 May 2013 - 05:16 AM, said:

The problem I see with most truther observation of the towers is that each floor is built to withstand the entire building above it. Which is an absolute false assumption. Each floor is rated to withstand a static load, I believe 2-3 floors in total.

Yes and no, but you are right, from a construction engineer'spoint of view, that description is so simplistic as to be misleading. Similarly, I am afraid, I am about to throw out some numbers here that some of you will recognize as not actually being 100% correct in application towards engineering, but I am doing so just to try to explain an incredibly compex subject with the most basic formulas that people might recognize.

Sooo...that said:

In the real world, at this point in the collapse of the towers, the process is most accurately described as an avalanche, which cannot be calculated quite so simply as I am doing here. In an avalanche, there are forces working somewhat chaotically and infinitely randomly, to the point that we actually

*expect* to see statistical improbabilities (including objects falling faster than freefall). Again, keeping this simple, just to give people an idea of the forces involved. We went from a slab with a mass of 200kg suddenly gaining the energy of a slab weighing over 23,000 kg just by falling 3m. Let's continue.

So, we have the results of ONE floor collapsing 3 meters. Gravity is by no means satisfied.

Now floors 5 and 6 are travelling downwards, but unlike before, they are not beginning from an At Rest position. Now the two floors have a mass of 400kg, and are moving downwards at a speed of 6.6m/s, slowed down a bit by the impact (hard to determine with collision equations, so I am assuming rather generously that the full avalanche was robbed of almost 90% of its strength in hitting floor 4, which is patently ridiculous). Since we have an Initial Velocity greater than zero, we use a different set of formulas (Motion Equations) to figure that if we have something moving at 6.6m/s and accelerating at 9.8 m/s/s for 3 m, we get a final velocity of

**10.1**m/s. Using our Impact formula like before, our two floors strike with a combined force of

**81,608**N.

Poor floor 4 was only ever meant to hold up 3 floors, with a combined total of 5880N. It gets utterly steamrolled by more than x13 that amount. Floor three gets hit .3 seconds later, math, math, math, impact velocity

**36.4**m/s,

**1,589,952**N. Floor 2, impact velocity

**177**m/s,

**62,658,000**N, Ground floor…yeah, not much left at this point.

As we can see, the amount of energy created by a collapsing floor is quite significant, and combined with the acceleration of gravity, rapidly reaches levels that humans simply cannot properly visualize?

Did anyone notice what I omitted from the above example, where 1 floor devastated the 5 floors below it?