Inherent and Centrifugal Forces in Newton (original) (raw)
2006, Archive for History of Exact Sciences
Over the last few years a resurgence of Newtonian studies has led to a deeper understanding of several aspects of his Philosophiae naturalis principia mathematica. Besides the new translation of Newton's masterpiece, these contributions touched on his mathematical style, investigative method, experimental endeavors, and conceptual systematization of key notions in mechanics and the science of motion. 2 With regard to the last topic, recent works have identified two notions where Newton's choices look unclear and scholarly opinion is divided. These notions are materiae vis insita or vis inertiae, namely the inherent force of matter or force of inertia, and vis centrifuga or centrifugal force. It is my conviction that the two notions became inter-related in Newton's thought starting from the time of composition of the Principia and that a new look at them will simultaneously clarify matters about both. Newton's beliefs about the nature of centrifugal force did not affect his calculations of planetary and cometary orbits in the Principia, but they are none the less of considerable intellectual interest.
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