Fun With Chained Metal Beads

Submitted by: Squrlz4Sale 4 years ago in Science

A chain of metal beads exhibits some surprising behaviors.
There are 15 comments:
Male 40,772
The rope would need to be really long, 100 feet or more, just to get it going & have enough time to see it happen.
The drop would need to be long too, and the flexibility of the rope is important: to floppy and it won`t work, too stiff and it won`t fall properly.

My Mum moved to a 4th floor apartment with a balcony, I`ll give it a try with the longest rope I can find :-) and report back!
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Female 6,381
Squrlz: I think you`d have to weight the end of the rope to get it to pull hard enough, so you`d have to be a few floors in the air. But otherwise, sure, let`s see a test. Anyone?
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Male 6,227
There remain a lot of unanswered questions here. For example, could you get a rope to do the same thing? How about a heavy rope? Does it *have* to be a beaded chain? If so, why?

(Carmium, I think you hit on some key points. I`d just like to see this tried with a rope.)
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Male 13,630
now a religious sort would make a psalm of this
But its all physics
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Male 7,774
What if he stood on a ladder...in a really deep hole. That would confuse it.
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Male 5,094
I`ve seen ropes do the same but for once I haven`t even got a theory.
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Male 7,774
Maybe if he stood on the empire state building it would reach the moon.
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Male 5,872
@Carmium: My conclusion exactly.
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Male 1,239
It`s the same as a siphon from a water source high in elevation from the destination. If each bead is one gallon of water and we yank the tip out to the floor 50 gallons of pressure is pulling from the top when the end finally hits the floor. This momentum is kept up until the end. Not much different than water really.
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Male 6,227
@ Carmium: Ooo, Carmium, I`m impressed! I like your reasoning.
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Female 6,381
I suggest the following:
Bead chains have a certain limit to their flex; they are made of little barbells with their ends trapped in little balls and can only bend so far before breaking as it is. If a chain is pulled on at one end, that stiffness increases, and the chain must form an arc to leave the beaker.
Anchor chains on a ship have more loosely attached links and don`t usually display this kind of behaviour when the anchor is dropped.
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Female 111
I think the music was well placed in this case
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Male 3,060
I thought "Fun With Chained Metal Beads" was going to be something completely different.
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Male 40,772
@5Cats: "Quite simple really! I don`t want to spoil the fun by explaining it..."

@Squrlz4: "You have no idea, do you!"

@5Cats: :blush: "Nope, not a clue..." :-(

(Really though, his explanation works just fine. I`d like to see them stand on a ladder and do that! Physics is fun!)
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Male 6,227
Link: Fun With Chained Metal Beads [Rate Link] - A chain of metal beads exhibits some surprising behaviors.
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