I]t is essential to deal with the same set of particles throughout the time interval[ | |
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Metaphysics Research Lab, Stanford University | Celestial Mechanics and Dynamical Astronomy |
I Bernard Cohen Peter M.
Hannah, J, Hillier, M J, Applied Mechanics, p221, Pitman Paperbacks, 1971• Any single force is only one aspect of a mutual interaction between two bodies | Cambridge UK: Cambridge University Press |
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] Consequently, the mass of the system can not change during the time of interest | Cambridge UK: Cambridge University Press |
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