I am looking at a situation in the future where I plan to simulate an 
entire area that is rotating, like a big drum. This will be done by 
simply having the wall texture on the entire outer surface drift, as 
though its spinning. But, I also want to place a suspended rail tram in 
there, and have it react (sadly, due to the limits of the system, only 
with one angle, since I can't have more than one pivot point), as though 
its being effected by the rotation, as well as its changes in momentum. 
I am presuming that the math for this has to be:

http://www.myphysicslab.com/pendulum_cart.html#navsite

But.. then I run into a problem... Basically, I am not sure what the 
frak is going on there...

Biggest issue is, there is a lot of stuff in it that won't help me. 
Friction.. Well, no, the cart isn't going to be controlled via "forces", 
its running a plotted course, so half the stuff in the "force of the 
cart" part is just flat out meaningless. Then there is the fact that my 
force calculations need to be only the force that its being applied "at 
that moment" in one direction, two 3D vectors. That one is going to give 
me issues, as it is. But, maybe I can direct substitute it in as F, or 
something. Do I assume the cart mass itself is 0? Why can't there ever 
be a simple, "Someone did this once, for a very similar situation, so 
here is the math, and all you need to do in integrate the other rotation 
thing you are doing." You know, instead of googling, and getting page 
after page of descriptions, without math, of the things, or articles on 
control systems, without math, for them, or just about anything other 
than an explanation of how the frak it works in a real world, 3D 
situation. lol

At the very least, some idea what I can/should do to cut extraneous data 
out of the equations I do have, would be helpful. I am just real glad 
the "pendulum" is going to be "one directional" just like the example, 
and not with two axis of rotation, like.. a lot of them have.

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