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Chockstone Forum - Gear Lust / Lost & Found

Rave About Your Rack Please do not post retail SPAM.

Topic Date User
Gear ratings - a physics question 26-Nov-2007 At 4:03:44 PM ni
Message
On 26/11/2007 mikl law wrote:
>Wexler equation
>F = (1+(sqrt(1=2kh/(mg))))
>F is force
>k is rope stiffness
>h is height fallen
>m is climber mass
>g is gravitational constant


This equation has to be wrong because it predicts that a heavier climber will exert less force on a rope than a lighter climber (the mass term is in the denominator and increasing this decreases the overall result)
The force exerted on a rope by a falling climber is approximately proportional to the square root of the mass of the the climber.
This is very reassuring for heavier climbers. Just because you weigh twice as much as some euro sport-dogger, it doesn't mean you are putting twice as much force on the rope in a fall. Only about 50% more.

Sorry. Forgot the quote
Ni

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