rock climbng

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From: Mark Lawton (markslawton@hotmail.com)
Date: Mon Mar 08 2004 - 10:40:09 PST 

From: "Mark Lawton" <markslawton@hotmail.com>
Subject: rock climbng
Date: Mon, 08 Mar 2004 10:40:09 -0800
Message-ID: <BAY7-F119GnjVK5LuoJ00049819@hotmail.com>

Here are some ideas that come to mind as a climber and physics teacher...

1) rate at which climber will fall if climber neglects to tie knot
2) pendulum problems for the wild climber who goes too far right or left of
the route
3) maximum force that the rope must bear
         worst case is a long fall on a short rope ( at the beginning of the
climb)
        best case is a short fall on a long rope (at the end of a climb)
4) force that arms must bear
           best case - keep hips close to wall so that arms are vertical,
and close to wall
5) barn door effect - tendency of body to swing away from wall when making
poor choices for hands
6) pulley problems - how high the belayer goes when catching the fall of a
lead climber. ignore friction
7) maximizing friction by running rope an angle through belay device
8) minimizing friction by using runners on protection placed in cracks

i'm sure that paul has other ideas.

-mark lawton
teacher, coach, expert napper

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