I wasnt sure where this should go, but figure I leave it here.
So I was debating someone who believed in the 9/11 conspiracy, more specifically the claim that they collapsed at freefall speed. Now I dont know much about physics, nor do I know much math, but I do remember very few equations from just random books and articles. One happened to be the equation for "distance traveled" (d=vit+1/2at^2)
Now I did the number crunching for freefall speed from atop an object 417m tall, and got the time of 9.23 seconds for an actual freefall speed collapse. Figured I nailed it because thats the number I remember truthers saying the towers fell in. I showed him a video which clearly shows the towers taking at least 15.23 seconds and also 22.02 seconds to collapse.
Game over? Wrong. He told me that "Physics only works in a vacuum, but not on earth." Obviously my jaw dropped. Now I know what he was referring to, wind/air resistance, but did he really think that it would have slowed the towers from 9.23s to 22.02s?
Yet a question arose in my mind anyway. Is there a way to somewhat accurately account for air resistance of an object? How much could debris of possibly slowed down from air resistance after being ejected from the building? I thought it would be interesting to know, and possibly be able to somewhat calculate. A sort of margin of air resistance error to my original time of 9.23s.
So I was debating someone who believed in the 9/11 conspiracy, more specifically the claim that they collapsed at freefall speed. Now I dont know much about physics, nor do I know much math, but I do remember very few equations from just random books and articles. One happened to be the equation for "distance traveled" (d=vit+1/2at^2)
Now I did the number crunching for freefall speed from atop an object 417m tall, and got the time of 9.23 seconds for an actual freefall speed collapse. Figured I nailed it because thats the number I remember truthers saying the towers fell in. I showed him a video which clearly shows the towers taking at least 15.23 seconds and also 22.02 seconds to collapse.
Game over? Wrong. He told me that "Physics only works in a vacuum, but not on earth." Obviously my jaw dropped. Now I know what he was referring to, wind/air resistance, but did he really think that it would have slowed the towers from 9.23s to 22.02s?
Yet a question arose in my mind anyway. Is there a way to somewhat accurately account for air resistance of an object? How much could debris of possibly slowed down from air resistance after being ejected from the building? I thought it would be interesting to know, and possibly be able to somewhat calculate. A sort of margin of air resistance error to my original time of 9.23s.
via JREF Forum http://forums.randi.org/showthread.php?t=268919&goto=newpost
Aucun commentaire:
Enregistrer un commentaire