[NOTE: Because truthers and conspiracy theorists in general are unable to focus on one specific topic due to the fact that they are not able to substantiate their claims while doing so, I have decided to divide a few of the most important arguments regarding the conspiracy theory into their own threads, as to maintain focus on those particular topics. This way, I hope to get truthers to focus on one argument at a time and maybe actually extract some real discussion out of them instead of a complete avoidance of all of my rebuttals. Please don't take these threads as spamming, as it is necessary to address these issues and the conspiracy theory as a whole]
Did the Towers Fall At Free-Fall Speeds?
Actual collapse times extracted from timing of the collapse in the videos at the end of this post.
WTC1 (North Tower)
Height = 417m (1,368 ft)
Source
Acceleration Due to Gravity: 9.81 m/s/s
Free Fall Speed:
h=0.5gt^2
t=(2h/g)^0.5
t=(2*417/9.81)^0.5
t = 9.22 seconds
Actual Time of Collapse:
t = about 22.02 seconds
WTC2 (South Tower)
Height = 415m (1,362 ft)
Source
Acceleration Due to Gravity: 9.81 m/s/s
Free Fall Speed:
h=0.5gt^2
t=(2h/g)^0.5
t=(2*415/9.81)^0.5
t = 9.20 seconds
Actual Time of Collapse:
t = about 15.28 seconds
WTC7
Height = 186m (610 ft)
Source
Acceleration Due to Gravity: 9.81 m/s/s
Free Fall Speed:
h=0.5gt^2
t=(2h/g)^0.5
t=(2*186/9.81)^0.5
t = 6.16 seconds
Actual Time of Collapse:
t = about 25 seconds
CONCLUSION:
The buildings obviously did not fall at near-free-fall speeds, and their actual collapse times were significantly longer.
YouTube - WTC 7 Collapse
YouTube - 9/11 Debunked: World Trade Center - No Free-Fall Speed
