9-11 Presentation at NMSR, May 19 2010

DGM said:
Don't go there!
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Actually, you're right. I should clarify. Yes, gravity is pulling all things in the same direction. Resistance of other objects causes those things to move in other directions. The pieces of rubble are not all moving in the same direction.
 
ergo said:
No, finish what you started. Your conclusions don't follow. Explain it for us.
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In order for your "rubble" to spill over the sides it must impart it's gravitational energy (or some part of) to the part it impacts to make it actually change direction., The exact amount varies depending on how much it's path is altered.
 
Myriad said:
Gravity pulls some pieces of rubble in some direction other than down? Please give an example.
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Yes, gravity is pulling all things in the same direction. Resistance of other objects causes those things to move in other directions. The pieces of rubble are not all moving in the same direction.

The bolded, like the rest, is completely correct.
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The bolded is incorrect.
 
ergo said:
Because the rubble is a loose and randomized collection of building fragments and tends to spill over the sides. Individual rubble pieces do not have sufficient mass to crush through intact building components.
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Have you not heard the phrase about things that "hit like a ton of bricks"?

Note that the phrase refers to a loosely organized collection of bricks. No mortar, no rebar, no solid building, just a ton of bricks.

The phrase means "to surprise or shock someone very much."

According to your "physics," they shouldn't even be mildly surprised!
 
DGM said:
In order for your rubble to spill over the sides it must impart its gravitational energy (or some part of) to the part it impacts to make it actually change direction. The exact amount varies depending on how much its path is altered.
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Correct. Continue.
 
ergo said:
Actually, you're right. I should clarify. Yes, gravity is pulling all things in the same direction. Resistance of other objects causes those things to move in other directions. The pieces of rubble are not all moving in the same direction.
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Yes they are! Down! Unless acted on by another object. Then what happens to the gravitational energy?


It's not looking good for that lower block is it?
 
ergo said:
I think most of us have. Please explain how a "ton of bricks" will crush through 90 intact storeys of steel and concrete in under 13 seconds, without mostly spilling over the sides.
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Momentum and gravity.
 
ergo said:
I think most of us have. Please explain how a "ton of bricks" will crush through 90 intact storeys of steel and concrete in under 13 seconds, without mostly spilling over the sides.
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You haven't been listening. What happens to the energy that causes the bricks to "spill over the side"?
 
ergo said:
Just explain it, Big Al. It would take far fewer posts than your dodging.
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I don't know where to start. Pick up a high school physics text.

For most of us, things like vectors, momentum and particles are obvious basic concepts. I'm not going to write a physics course here for you when you can go to a library and do your own reading.
 
DGM said:
Yes they are! Down! Unless acted on by another object. Then what happens to the gravitational energy?
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The pull of gravity remains constant. The kinetic energy, if that's what you mean, gets dispersed into different vectors.

It's not looking good for that lower block is it?
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This doesn't follow.
 
how do you people even function in the real world? according to this reasoning 50 $1's couldn't get you a $40 dinner.
 
BigAl said:
For most of us, things like vectors, momentum and particles are obvious basic concepts. I'm not going to write a physics course here for you when you can go to a library and do your own reading.
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Anyone got a used dodge for sale? Oh yeah, Big Al does.
 
ergo said:
Anyone got a used dodge for sale? Oh yeah, Big Al does.
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Speaking of dodging:

So when loading trucks from a silo, they just dump everything in at once because it doesn't impart any more force on the truck than if they let it out slowly?
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According to your understanding of physics, is the bolded part a correct statement? Yes or no.
 
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ergo said:
The pull of gravity remains constant. The kinetic energy, if that's what you mean, gets dispersed into different vectors.



This doesn't follow.
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"Different vectors"? Wouldn't that be the building below (in this case)?


And yes it does follow. Very nicely and exactly the same way every time.
 
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