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Re: [cracklover] Gear Tuggers know nothing???:
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granite_grrl
Oct 30, 2007, 5:41 PM
Views: 3334
Registered: Oct 25, 2002
Posts: 15084
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cracklover wrote: Nope. Even if he was correct that the peak force from sitting back on a dynamic line is not higher than the weight of the climber, he is still wrong about his calculation on the force the top piece feels. It would not feel 2X the weight of the climber, but ~ 1.6X. Do you know why?
Do you know why? In the simplist form, ignoring and losses from friction, etc it is 2x the climber's weight. But any one who has a mediocer understanding of physics would understand that there will never be exactly 2x the person's weight on the rope.
Likewise to proclaim that it's very close to 1.6x is also ignorant. How much friction is there? What is the angle of the rock? Does the person have one or two legs (or nothing) thouching the rock? Does the person have a nice little ledge to put their feet on? Is the person hanging straight down or are they pushing back from the peice? Simplier to just do a basic calc sans friction, vectors, etc.
Edited to add that I haven't done a statics course since second year university and I'd like to cracklover the benifit of the doubt and have him explain his calcs a little better.
(This post was edited by granite_grrl on Oct 30, 2007, 5:50 PM)
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Post edited by granite_grrl
() on Oct 30, 2007, 5:50 PM
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