Spiny Norman said:
The chain goes up before it goes down.
Wow. That’s a puzzler. Haven’t watched all of it, come back to it later.
captain_spalding said:
Spiny Norman said:
The chain goes up before it goes down.
Wow. That’s a puzzler. Haven’t watched all of it, come back to it later.
It’s a bit long!
Watched the first three minutes or so.
The beads have an upward momentum as they pass the top of the jar, so continue upwards for a bit.
Spiny Norman said:
The chain goes up before it goes down.
Electroboom also has a video on the subject.
https://www.youtube.com/watch?v=hx2LEqTQT4E&ab_channel=ElectroBOOM
Sibeen will appreciate the 1:40 mark.
The Rev Dodgson said:
captain_spalding said:
Spiny Norman said:
The chain goes up before it goes down.
Wow. That’s a puzzler. Haven’t watched all of it, come back to it later.
It’s a bit long!
Watched the first three minutes or so.
The beads have an upward momentum as they pass the top of the jar, so continue upwards for a bit.
The question then is, why doesn’t a string behave the same way.
Presumably the division of the chain into short straight segments with joints with very little flexural stiffness has something to do with it.
Interesting, thanks SN.
The Rev Dodgson said:
The Rev Dodgson said:
captain_spalding said:Wow. That’s a puzzler. Haven’t watched all of it, come back to it later.
It’s a bit long!
Watched the first three minutes or so.
The beads have an upward momentum as they pass the top of the jar, so continue upwards for a bit.
The question then is, why doesn’t a string behave the same way.
Presumably the division of the chain into short straight segments with joints with very little flexural stiffness has something to do with it.
The Rev Dodgson said:
captain_spalding said:
Spiny Norman said:
The chain goes up before it goes down.
Wow. That’s a puzzler. Haven’t watched all of it, come back to it later.
It’s a bit long!
Watched the first three minutes or so.
The beads have an upward momentum as they pass the top of the jar, so continue upwards for a bit.
That’s addressed in the video.
playing with my crayons, was thinking about it like this
sibeen said:
The Rev Dodgson said:
captain_spalding said:Wow. That’s a puzzler. Haven’t watched all of it, come back to it later.
It’s a bit long!
Watched the first three minutes or so.
The beads have an upward momentum as they pass the top of the jar, so continue upwards for a bit.
That’s addressed in the video.
And what is the conclusion of this address?
Understanding the chain fountain, Biggins J. S. and Warner M. Proc. R. Soc. A. 470 20130689 http://doi.org/10.1098/rspa.2013.0689
Very interesting.
I immediately thought that it might be due to a transitory magnetic effect. It’s probably not but it would be interesting to see an experiment with bon-metal beads arranged with a similar restricted ROC.
interesting video.
