On Wed, Jun 13, 2001 at 09:10:48AM -0700, Ward Silver wrote:
> > > If both ends of the rope are moving, there is
> > > NO mechanical advantage, only a direction change
> > > plus loss due to friction.
> > >
> > > de Tom N4KG
> Correct you are! The minute Lightweight Larry begins his fateful upwards
> journey, the whole equation changes. Any downwards tension beyond his
> weight disappears in that situation.
> "And then, while I was laying there looking up at the bottom of the
> barrel, I let go of the rope..."
Thanks for remembering that classic, Ward. I have a copy of it around
somewhere, but won't show it to my XYL until AFTER I get a tower and
If we start including friction, then we also have to add the mass of
the block and tackle, pulley inertia, etc. I'll have to dig out my
graduate-level physics texts--NOT!
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