Nope I've never taken a physics course. For a building that had temperatures of 2000 degrees roaring through a portion of it, I'm surprised that there wasn't further damage on the offices right next to the collapsed wall (as seen in the presentation on
http://www.pentagonstrike.co.uk).
The below link is a videoclip from CNN shows reporter Jamie Mcintyre, making some very surprising statements, "From my close up inspection, there is no evidence of a plane having crashed anywhere near the Pentagon..."
http://letsroll911.org/phpwebsite/files/documents/Cnn.Pentagon.Jamie.Mcintyre.swf
Also 2 of the named hijackers, still on the FBI list as perpetrators, named by the FBI and still on their list as those responsible, or Khaled al Mihdhar and Salem al-Hazmi are both Alive and well! Don't need a physics course for that one.
Also on
www.letsroll911.org, they have a demonstration of the power of a airliner's jet engine and how it can push objects for a great distance.
http://www.letsroll911.net/images/simulation.mpeg
They used this demonstration to pose the question as to why those wire spools still are sitting close to the building if a jet engine just roard past them and into the building.
Also the actual hole in the building, prior to it collapsing was about 14ft by 16 ft. Which is less than have the size of the plane's width and height.