Understanding the Physics of the Collapse of WTC Towers

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The discussion centers on the physics behind the collapse of the WTC towers, particularly how the falling upper section interacts with the lower section. A key point raised is that an object accelerating downward exerts less force on the structure below, leading to confusion about whether the lower section should have arrested the falling upper section. The original poster argues against this notion, citing that the collapse did not align with that expectation. The conversation emphasizes the complexity of the physics involved and the tendency for such discussions to veer into conspiracy theories. Overall, the mechanics of the collapse remain a topic of interest and debate among those examining the events.
Illuminist14
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Collapse of WTC towers...

Hi all,

I am a Layman in physics unfortunately, this is my first post so be kind please.

I Know that an object accelerating downward exerts less force on the part below than if it were being held in place, But how does this relate to the top section of the WTC falling on the below section? Some people say because of that statement, the second lower section should arrest the falling upper section. I do not think that should happen though, as it did not in reality.

Your thoughts would be appreciated.

Thanks
 
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