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Old 5th November 2006, 02:20 PM   #11
R.Mackey
Philosopher
 
Join Date: Apr 2006
Posts: 7,854
Judy Wood's "Math"

Her approach is even stupider than I imagined it could be.

This figure, Figure 6 from http://janedoe0911.tripod.com/BilliardBalls.html, shows her collapse time:



Each of those colored lines is meant to represent the trajectory of a single WTC floor.

You'll notice they all start from rest, and all accelerate at a constant rate (gravity).

In other words, Woods is assuming that when falling floors hit floors below, they impart no energy at all to the floors below -- merely break them loose.

In reality, the falling upper pile of debris not only breaks lower sections loose, but also imparts momentum, and this momentum increases as the collapse progresses.

I'd fail this report in a junior high physics class.
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