Sept12200112accelerationduetogravitytimesquared movies iraq_911 newsandpublicaffairs Video that applies a basic physics equation to the collapse of the North Tower of the World Trade Center on 9/11. Concludes that high explosives were instrumental in the structural failure of the Tower. Distributed under US Code Title 17, Chapter 1, Section 107 - Fair Use: Scholarship and Research; nonprofit educational purposes. Also distributed under the GPL and Creative Commons licenses. 2005 2005 9/11;9-11;Sept. 11;World Trade Center;North Tower;freefall;gravity;high explosives;fireballs;FDNY;NYPD;Farrell; Xavier http://creativecommons.org/licenses/by-sa/2.5/ 2005-09-27 20:43:52 2005-09-27 18:39:51 ping127001.com matt@ping127001.com ping127001.com Diana Hamilton ping127001.com ping127001.com ping127001.com ping127001.com ping127001.com 2005-09-30 10:20:01 2006-01-18 10:29:38 2006-03-25 17:28:13 2006-03-30 12:51:27 2006-04-06 23:26:40 2006-04-18 00:18:56 2006-05-02 17:24:58 ping127001.com Computer Services ping127001.com Productions sound color 15:51 www.ping127001.com Part I: Intro, Pictures of Ground Zero, collapse, aftermath Part II: Formula and walkthough using height of the North Tower Part III: Video of the North Tower collapse (whole) Part IV: Quote of World Trade Center Steel Part V: Segments showing explosions in upper portion of North Tower collapse Part VI: Conclusion, dedications 1. Photos of Destruction at World Trade Center, people running from the collapse, picture of a woman looking at a wall of the dead 2. Formulas: Height = (1/2) (acceleration due to gravity) * (time)squared The North Tower of the World Trade Center: - Height of North Tower = 1,368 feet - Acceleration due to gavity = 32 feet/sec(squared) - 1,368 = (1/2) (32) (t)squared - Multiply by both sides by 2: 2,736 = 32t(squared) - Divide both sides by 32: 85.5 = t(squared) - Square root of both sides: 9.2 seconds = t - Solving for time in seconds one gets: 9.2 seconds - Meaning: an object that goes into complete freefall from the top of the North Tower hits the ground in 9.2 seconds (in a vacuum) - Time for North Tower to collapse: approimately 10 seconds (.8 second difference for drag from air) Therefore, the numbers are statistically equal; ergo, the North Tower went into complete freefall. Had it been a *true* structural failure, it would have taken a much longer time. - 110 floors of North Tower/2 floors collapsing per second = 55 seconds - 110 floors of North Tower/3 floors collapsing per second = 36.6 seconds - 110 floors of North Tower/4 floors collapsing per second = 27.5 seconds 55 seconds, 36.6 seconds and 27.5 seconds are not even close to 9.2 seconds. English New York City, downtown Manhattan MovingImage 2006-05-12 16:43:28 ewingrr newsandpublicaffairs