The Inherent Linearity of Impetus

Chapter
Part of the Boston Studies in the Philosophy of Science book series (BSPS, volume 288)

Abstract

This chapter discusses the inherent linearity of Fabri’s impetus, which entails specifically conservation of rectilinear motion rather than of both linear and circular motion (as, for example, Isaac Beeckman and Pierre Gassendi maintained). Fabri, following Descartes, employs the old scholastic notion of determinatio to describe the necessary basic linearity of impetus (and consequently motion): “an impetus”, he declares in De impetu, “must be determined (determinatus) along a certain line of motion”. Fabri’s use of the concept of determinatio, within his analysis of reflection from totally elastic planes, is subsequently described. Finally, Fabri’s view concerning circular motion is outlined: as a direct consequence of his (relatively) modern conception of motion as inherently linear, Fabri regards circular motion as arising from an impeded straight motion, and accordingly observes that a stone tied to a sling will proceed along a straight line tangential to the circular original trajectory if the rope suddenly breaks.

Keywords

Incline Plane Circular Motion Elastic Plane Curve Motion Rectilinear Motion 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

References

  1. Clagett, Marshall. 1955. Greek Science in Antiquity. New York, NY: Abelard-Schuman.Google Scholar
  2. Clagett, Marshall. 1959. Science of Mechanics in the Middle Ages. Madison, WI: University of Wisconsin Press.Google Scholar
  3. Damerow, Peter, Gideon Freudenthal, Peter McLlaughlin, and Jürgen Renn. 2004. Exploring the Limits of Preclassical Mechanics. 2nd ed. New York, NY: Springer.CrossRefGoogle Scholar
  4. Drake, Stillman, and I.E. Drabkin. 1969. Mechanics in Sixteenth-Century Italy: Selections from Tartaglia, Benedetti, Guido Ubaldo, and Galileo. Madison, WI: University of Wisconsin Press.Google Scholar
  5. Fabri, Honoré. 1646. Tractatus physicus de motu locali, in quo effectus omnes, qui ad impetum, motum naturalem, violentum, & mixtum pertinent, explicantur, & ex principiis physicis demonstrantur; auctore Petro Mousnerio Doctore Medico; cuncta excerpta ex praelectionibus R.P. Honorati Fabry, Societatis Iesu. Lyon.Google Scholar
  6. Fabri, Honoré. 1648. Metaphysica demonstrativa, sive scientia rationum universalium; auctore Petro Mousnerio Doctore Medico; cuncta excerpta ex praelectionibus R.P. Hon. Fabry soc. Iesu. Lyon.Google Scholar
  7. Freudenthal, Gideon. 2000. A Rational Controversy over Compounding Forces. In Scientific Controversies: Philosophical and Historical Perspectives, eds. Peter Machamer, Marcello Pera, and Aristides Baltas, 125–142. New York, NY: Oxford University Press.Google Scholar
  8. Gabbey, Alan. 1980. Force and Inertia in the Seventeenth Century: Descartes and Newton. In Descartes: Philosophy, Mathematics and Physics, ed. Stephen Gaukroger, 230–320. Sussex: Harvester Press.Google Scholar
  9. Gabbey, Alan. 1998. New Doctrines of Motion. In The Cambridge History of Seventeenth-Century Philosophy, eds. Daniel Garber and Michael Ayers, 649–679. Cambridge: Cambridge University Press.CrossRefGoogle Scholar
  10. Koyré, Alexandre. 1978. Galileo Studies (trans: Mepham, J.). Hassocks: The Harvester Press.Google Scholar
  11. Lukens, David C. 1979. An Aristotelian Response to Galileo: Honoré Fabri, S.J. (1608–1688) on the Causal Analysis of Motion. Ph.D. Thesis, University of Toronto.Google Scholar
  12. Palmerino, Carla Rita. 2004. Galileo’s Theories of Free Fall and Projectile Motion as Interpreted by Pierre Gassendi. In The Reception of the Galilean Science of Motion in Seventeenth Century Europe, eds. C.R. Palmerino and J.M.M.H. Thijssen, 137–164. Boston Studies in the Philosophy of Science, Vol. 239. Dordrecht: Kluwer.Google Scholar

Copyright information

© Springer Science+Business Media B.V. 2011

Authors and Affiliations

  1. 1.Max Planck Institute for the History of ScienceBerlinGermany

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