Recent content by rdx

You're funny I defined the problem. Now you're telling me I need the "correct" model. Then you change the problem with simplifying assumptions; then you don't answer you wave your arms and claim text solve it? Whew, you must be tired out. But where's the solution? No, it's still hard, you...

Hmmm, interesting. I find it fascinating that an apparently simple problem like a table is so hard/impossible to solve. You wonder at all the weird theories about string theory and all, maybe people need to get back to basics and find some new techniques for evaluating the "simple" stuff...

Perhaps I should spell out the whole problem. I am designing software to simulate a 6-legged robot and part of this software analyzes the interaction of the robot with Newton's laws. As the robot walks or stands, I am trying to work out the loading on each leg. There are typically three legs...

I have a Halliday, Resnick text called Physics. I will look for Young's. I also have a Mechanics by Symon. I will see what I can find. Thanks.

Assuming I have such a text, great. If not, can you point me to a site? Thanks.

In other words you don't know. This clearly won't work generally. How about 5 legs, or 6? No, I am doubtful. I listed the known eqns, yours is bogus.

I don't get it. Write the eqn for me so I can see it.

I'm from Missouri. You'll have to show me.

Okay, 3 legs: w1 x1 + w2 x2 + w3 x3 = 0 ; moment in x-axis w1 y1 + w2 y2 + w3 y3 = 0 ; moment in y-axis w1 + w2 + w3 = W ; force balance. These 3 equ can be solved for three unknowns, ie the w's. Now throw in a fourth leg, a w4, you have a problem because there is no fourth eqn.

Yeah, that works for three legs. Try it for four.

Doesn't the Standard Model comprehend point particles? That would seem to be particularly misleading.

LOL. However, when I say "work out" I mean mathematically.

Suppose I have a table with 4 legs and on this table I have a concentrated weight at an arbitrary location. How do I work out the distribution of weights on the legs?

Does echo work with name? I thought you needed print_r.

There is a note in the docs of one package, phpAdmin or something that mentions a bug in MSIE that is provoked by Apache and PHP, or some such. I have had such crashes, hanging MSIE and crashing Linux and/or MySQL at the same time. Should I believe you or my own eyes? :)