Do you want to test your knowledge of Newtonian physics?



According to the New York Times Science section, "a key to understanding the phenomenon, [said Dr. John Biggins, a Cambridge physicist] is that mathematically, a chain can be thought of as a series of connected rods. When you pick up one end of a rod, two things happen. One end goes up and the other goes down, or tries to. But if the downward force is stopped by the pile of chain beneath there is a kind of kickback, and the rod, or link, is pushed upward. That is what makes the chain rise..."

He continues, "'Finding a new physics problem in an Internet video was,' Dr. Biggins said, 'something of a treat. For a scientist it's "really reassuring" that new problems like this can pop up,' he said."

In other news, physics, (along with Newton's 3rd Law) how do they work?

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It's funny how this can be answered with a quote from the Doom film:

"I gotta take a dump."

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I saw this a while ago. I've heard half-a-dozen different casual explanations. This seems to be one of those things like powered flight where nobody can come up with a satisfying force diagram. My dad actually thinks this is video trickery.

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Creaphis said:

I saw this a while ago. I've heard half-a-dozen different casual explanations. This seems to be one of those things like powered flight where nobody can come up with a satisfying force diagram. My dad actually thinks this is video trickery.

That's all I keep thinking after seeing it. I feel like he stuck the jar onto a surface upside down and then manipulated the chain from there. That's just me being quizzical, though what would anyone actually need to do to replicate this anyways?

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Believe it or not but it's no fake. I watched a documentation on TV a few weeks ago where this phenomena was explained.
It's basicly refering on Isaac Newtons law of inertia.

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tourniquet said:

Isaac Newtons law of inertia.

I wanted to post that. I wanted to look smart for once.

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It's a variant of fluid siphoning, but with a solid, segmented body instead of a liquid.

Creaphis said:

This seems to be one of those things like powered flight where nobody can come up with a satisfying force diagram. My dad actually thinks this is video trickery.


Seriously? When was that, in the early 19th century?



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Maes said:

Seriously? When was that, in the early 19th century?


Alright, well, I was thinking more along the lines of how theories of aerodynamic lift like "the Bernoulli effect" tend to have their limitations, but I didn't want to spend much time making my half-assed point. Forgive me for not delving deep into theoretical physics to make a better analogy.

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I always thought there has to be some great siphoning troll opportunity somewhere, like move an entire lake from one place to another with a big camouflaged tube or something. Though there's enough ecosystem destruction, so I guess no.

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Maes said:

Seriously? When was that, in the early 19th century?


If my understanding is correct, those diagrams show how the forces exist, but don't show why they exist.

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flubbernugget said:

If my understanding is correct, those diagrams show how the forces exist, but don't show why they exist.


It's easy to forget that air is still a fluid and not vacuum...

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Fascinating phenomenon and for aerodynamic lift force: are there people who live in barrels and dont believe in laws of physics? people sure can be stupid and ignorant

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Waffenak said:

are there people who live in barrels and dont believe in laws of physics?

They call themselves Creationists.

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Is it just me or did Maes assume control of this thread with his usefully labelled diagrams?

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