Recent content by Lorens

Easy math problem ... My question is just what do II means?

Oh a misunderstanding from my side, i thought we were talking about ice skater, they who tries to do a distance as fast as possible. anyway I got worried for awhile, and I started to believe I had misunderstood something. Anyway thanks a million for you help and time Hootenanny.

The skater is moveing forward in a straigth line the arms are rotating but not the body. I don't blamie you if you give up ... Kindly Paul-Martin

The thing who confuse me is that the bodies center of mass don't rotate, it translate, and the arms rotate around the shoulder and create a torque ...

oki thx, but what do it mean that the skater "skater spin faster" ? (i am from sweden .. )

I was reading this in http://en.wikipedia.org/wiki/Moment_of_inertia I can not understand, why would the mass become more concentrated around the rotation axis just because they move there arms, what have i missed? ... Kindly Paul-Martin

Ups i may have forgotten to add the picture http://img68.imageshack.us/img68/3416/tank15jc.jpg

The force have the same distance to a and b

A and B ...

The problem look like this in reality (symmetry) http://img481.imageshack.us/img481/811/a19nx.jpg

I have a problem which i ahve simplified to this http://img63.imageshack.us/img63/3998/bigproblem7hg.jpg I want to calculate the reaction forces but how? Torque equation give this 2F=0 Force equations give this 2F=0 Thx for any help given ...

But in Fem you often look into the von miese stress, and you can list the von mises stress for the diffrent nodes ...

What is the different between the max stress in a structure and the von mise max stress in the same structure? Kindly Lorens

Is the calculation in the Picture incorrect? The reason I believe so is that all the joints are torque free, but then I have been learned in school that you always can calculate the global powers in that way http://img74.imageshack.us/img74/5212/confused0yi.jpg

Yes it's static :smile: ...