posted on Mar, 25 2007 @ 03:58 AM
Guys, "perfect" is irrelevant. It wouldn't be 100% perfect no matter what the cause of its collapse. Engineers know this. That building still
fell right down into its own footprint. Anyone that says otherwise is an idiot as far as I'm concerned, I don't care anymore. Throw in a hundred
bucks and take any class with labs at a community college and you'll pick up real quick how stupid that argument is, when you start getting
experimental data that never exactly matches the ideas on paper.
Originally posted by Ahabstar
Please check my math on first post of page 5 of this thread. See if your calculation for unrestricted free fall of 570 ft is about the same.
I checked it for you.
I used a formula for motion from mechanics,
x = (.5)at^2
is displacement, a
is acceleration, t
Rearranging the above formula to find time for the roof to hit the ground with no resistance:
t^2 = x/(.5)a
NIST said WTC7 was 610ft tall.
t^2 = (610ft)/(16ft/s)
t = 6.2 seconds for WTC7's roof to fall to the ground with no friction whatsoever
And air resistance would
take effect, but whether or not its effect on the final time is worth considering is another issue. The real
resistance is coming from hundreds of thousands of tons of concrete and bolted-solid steel. In fact, you can't even really apply classical mechanics
to such a situation in a steel-frame structure, because we aren't sure how they are actually supposed to behave. That's something else though that
I don't feel like getting into, too late/early.
Btw you said that WTC7 didn't lean into itself, and was too level and so you doubt it's a CD.
Well, it did actually have a kink develop:
And so it did
fold into itself to prevent collateral damage.
[edit on 25-3-2007 by bsbray11]