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Yes. But, using an inverse truss, a form of cable truss and a tensegrity, described in Patent # US8474760B2, eliminates central trusses, significantly reducing weight. Mockups and the patent can be see at http://ffc.futurehistory.us/


No they will not cancel each other as both of them act on two different bodies.


It isn't necessary to introduce the effective potential in orbital mechanics but it is really useful. Let's say we have a particle moving in a central gravitational potential. Newton's laws give you a vector equation of motion \begin{equation} m \ddot{\vec{x}} = - \nabla U \end{equation} where $U = - G M m /r$. In a general coordinate system this is a ...


i only know the effective potential when talking about central forces situations in classical mechanics, there it is defined as: $V'(r) = V(r) + \frac{L^2}{2mr^2}$ with V(r) being the radial potential, the second term can be considered a centrifugal potential which results from considering the azimuthal part of the kinetic energy. $E = V + E_{kinetic} = ...


If I understand your question correctly, they do experience a different centrifugal force. They both travel along the equator, with equal but opposite speed with respect to the surface of the earth. But the Earth frame itself is a rotating reference frame. So you could look at the problem in non-rotating frame, where one of the objects has a speed ...

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