Actually V^2 = u^2 + 2 a dv^2= 2ad=2*9.8*.7*11=150=v^2, find the square root of 150, and bada bing, you get 12 meters per second
Where v = velocity
u = initial velocity
a = force of gravity
d = distance *(assuming that two floors completely collapsed)
so.......V^2 = 0 + 2 (9.8)(7.6m)
v^2 = 148.96
so.........v = 12.204 m/sec
...but close enough....
So since the top floors collapsing never encounter resistance the velocity should never exceed 12 m/sec....
...now lets calculate the resistance force...
..since the building always supported the top floors before the collapse the (mg) remains constant so
Resistance force = The Sum of (mg) + 123 (the number of people supported/floor x the number of floors remaining x 84 kg/person + safety factor
So the resistance force given a mass of 68,000 lbs and g = 9.8 is 669.700 newtons - any safety factor
WTF are you trying to calculate?
And what's up with the metric units. This is America, !
By the way, if a falling body doesn't encounter any resistance, it will continue to accelerate, i.e. it's speed will continue to increase over time.
Stay out of this savage, unless you've had over cal3...By the way, if a falling body doesn't encounter any resistance, it will continue to accelerate, i.e. it's speed will continue to increase over time.
Hey dumbass, I'm a licensed mechanical engineer, so take your cal3 and stick it up your ass.
If you were a engineer you would know why I'm using meters...duH!
Well, you can use English units, i.e. feet, DUH!
Can you help us design a steel framed structure that can survive earthquakes, tropical storms, blizzards, hailstorms, floods, hurricanes, space junk, tidal waves, typoons, cyclones, tornados, and stuka dive bombers, but will suffer global collapse from an office fire?
Can you help us design a steel framed structure that can survive earthquakes, tropical storms, blizzards, hailstorms, floods, hurricanes, space junk, tidal waves, typoons, cyclones, tornados, and stuka dive bombers, but will suffer global collapse from an office fire?
Sure, but I probably can't design one that can handle being struck by a 255,000 lb object moving at several hundred mph and carrying over 11,000 gallons of jet fuel.
come on brah, give some credentials
WTC 7 wasn't hit by an airplane. Not sure the relevance of your fantasy.
It wasn't imploded either so, I'm not sure of the relevance of your fantasy...that's gone on for too ing long now.
Expert scientists, engineers, demolition specialists, and architects have already determined that it was imploded.
More experts, scientists, engineers, demolition specialists, and architects with intimate knowledge of the site have not made that determination.
Name an expert, scientist, engineer, demolition specialist, or architect connected with the World Trade Center collapse investigation that has made that determination.
Then, produce the scientific paper where they prove it out.
Why not?
There was no reason at all to implode that building.
Because after the collapsing part hits the part still standing you've got to factor in resistance force...that's the problem with RG's numbers....he confuses mass with force.....for instance, if you throw a rock from a building its mass never changes, it has equal mass at the top, in the middle, and at the bottom, so what does change?
No, it's because Force is measured in newton-meters, but I'm sure if you're really a engineer you already knew that...
But you were talking specifically about velocity. Are you saying if you throw a rock from a building its velocity never changes on the way down?
The thing I never understand is that dan admits that he doesn't know and never knew how much weight each building was designed to support and consequentially exactly how much resistance the lower floors of each building would provide during a collapse. How can anyone make an equation without knowing that?
No...no...no....I said that the fastest Velocity the collapsing building would have was when it encountered no resistance...
..because I'm using constants for mass and not factoring in any safety margin...
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