DSK wrote:

So, I take that you've folded up a boom trying to lift something? Can
we assume that you learned nothing from it, other than "don't"?


Nav wrote:

Such vivid imagination.


Well, I have seen booms supported by rigid vangs that didn't fold up, so
obviously it can be done... if you do it right.

You think it can't be done, why? Conclusion: you did it wrong, and
decided it was impossible.


Yes a very vivid imagination. Dougs world -LOL


Funny you should say that, since you show no comprehension of how to
read the diagram, yet you pass judgement on my competence. The
resolution of forces is not obvious but it's also not rocket science.

If OTOH you *do* have some clue what you're talking about, tell us what
the mysterious symbol next to the mast represents.


Your statement makes no sense as you need to least show why my
calculation is wrong. After all I did solve the problem for the second
case for you -so either I can resolve forces and am correct or I cannot
and my answer is wrong! which is it? It would seem that you disagree
with my freshman solution so where's yours? So far you've only blustered
and obfuscated so I can't wait to see where the cosine in your diagram
gives the compression on the boom!

By the way, use of symbols does not mean that you understand them
-especially if _you_ put them in the wrong place.

Cheers