THE TWIN TOWERS AND THE LAW OF GRAVITY

 
http://www.checktheevidence.com/911/TwinTowersandGravity.htm

There is a simple observation and calculation that can be made. The Twin Towers collapsed in about 8 & 10 seconds respectively, top to bottom (ground level). They were 1350 feet high (source: Groliers Multimedia Encyclopedia, 2000 edition) ? let’s approximate to 1300 feet high.

 
Now, as we know: from the Law of Falling Bodies and the Laws of Motion, described by Galileo and Isaac Newton over 300 years ago.

   or if u=0,   

 

Rearranging for t gives: 

 

So, for a ball bearing dropped from the top of the towers, it would drop 400m (=1300ft). In the expression above, therefore, s = 400m. In the equation above, a is actually the acceleration due to gravity = 9.81 m/s². These are all checkable facts ? consult a physics textbook or encyclopedia.

 

So, the time taken for ball bearing free-fall =

 

= 9.03 seconds (assuming no air resistance)

 

Therefore, the towers came down with almost NO RESISTANCE. That means that, when the planes hit, IT MUST HAVE STARTED A CHEMICAL/CHAIN REACTION which caused *ALL* THE STEEL GIRDERS THROUGHOUT THE BUILDING to VAPORISE after a few minutes! This is clearly a fallacy! The heat of a kerosene-fuelled fire simply could not have caused this type of reaction. All other skyscrapers that have had fires ? sometimes burning for hours ? have not even come close to collapsing. Another checkable fact ? Kerosene burns at a maximum temperature of about 1500