The explanation suggested in the video struck me as unconvincing. Leverage might well explain the S-curve at the top of the fountain, yes. However the rising segment could apparently result from the upward acceleration applied to a link by the (virtual) pulley over the edge of the vessel. Now an intriguing stability question arises --- what determines the height of this pulley? Well, it might be the elasticity of the links, or it might be the height of the drop. I'd want to compare of different elastic coefficients and drop heights. Fred Lunnon On 6/19/14, Whitfield Diffie <whitfield.diffie@gmail.com> wrote:
Even with the explanation, I still find this amazing.
This is indeed wonderful. I wonder if it accounts for cases of chains hopping off of pulleys. It seems that if the explanation is correct, the phenomenon shold depend on the compressibility of the chain; suppose it had long thing links? Or rubber links?
Whit
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