Sustainable global economic growth Original Research Article

This survey highlights some recent advances on modeling the economic state of some nations of the world which are linked up in solidarity and competition or which are isolated. The problem of controllability, convergence, and permanence are explored. Some practical recent policy implications are deduced. Earth revolves around the sun in approximately circular orbit with radius r=ar=a, completing a revolution in the time T=2π(a3/GM)1/2T=2π(a3/GM)1/2 which is one earth year; here M is the mass of the sun and G is the universal gravitational constant. The gravitational force of the sun on the earth is given by GMm/r2GMm/r2 where m is the mass of the earth. Therefore, if the earth “stood still” losing its orbital velocity, it will fall straight on a line into the sun in accordance with Newtonʹs second law. View the MathML sourceMd2rdt2=-GMMr2. Turn MathJax on If this calamity occurred what fraction of the normal year T will it take for the earth to splash into the sun?” (Nagle, Saff, Snider) “Why did the earth stand still?” (Ndu Udo) “The symbol of Love and the earthʹs lover is the moon. With joy it dances around the earth in a circular orbit. When the inhabitants of the earth prefer hate and revenge to love, the moon stops to love, and stands still, losing its orbital velocity. It falls straight on a line into the earth in accordance with Newtonʹs second law. The crash makes the earth stand still precipitating the Armageddon.” (Wisdom Goodness)