Originally Posted by TruthSeeker1234
No estimated stated for North Tower.
: No estimates provided for collapse time.
8-10 second estimate, based upon seismic data
rebuttal to Jones' collapse time argument
collapse time estimates 8-14 seconds
Height of towers Height (ft) 1,368 source
Let's check this, for freefall, in a vacuum we use X=at^2/2 or X= .5*a*t^2 where X=distance, a=9.8 m/s^2 and t=time. http://www.lerc.nasa.gov/WWW/K-12/airplane/mofall.html
0 seconds => X=0
1 seconds => X=4.9m
2 seconds => X=19.6m
3 seconds => X=44.1m
4 seconds => X=78.4m
5 seconds => X=122.5m
6 seconds => X=176.4m
7 seconds => X=240.1m
8 seconds => X=313.6m
9 seconds => X=396.9m = 1028.87139 feet
9.25 seconds => X=419.25625m = 1375.51263 feet
9.5 seconds => X=442.225m = 1450.86942 feet
10 seconds => X=490.0m = 1607.61155 feet
Now, please cite exactly where NIST said it fell in exactly 9 seconds.