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Greg O
 
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Default Figuring loads / block & tackle theory


"Harry K" wrote in message
om...
"Greg O" wrote in message

...
Harry,
Is this drawing, really any differant from

20 20
\ /
\ /
\ /
\ /
\ /
40

this one?


40
/ \
/ \
/ \
/ \
/ \
/ \
20 20

Greg


No they are not the same: If the load in No.1 is 40 the drawing is
correct. If the load in No.2 is 20 the drawing is incorrect. In no.2
with load 20 the pull on the top will be 20 not 40.
See my experiment that I used to confirm the theory. It confirms what
I just said.

Harry K


Harry, print out the page, flip it over, then explain why they are
differant!
Greg