At the time when Newton formulated his law of motion, two kinds of motion had been described in precise yet simple mathematical terms: the motion of planets around the Sun (by Kepler) and the motion of projectiles and other falling objects on Earth (by GalileoGalileo). But for all their simple beauty, these were only descriptions; with his law of motion, Newton sought a mechanism.

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Gravitational Forces

  • Michael Anderson

摘要

At the time when Newton formulated his law of motion, two kinds of motion had been described in precise yet simple mathematical terms: the motion of planets around the Sun (by Kepler) and the motion of projectiles and other falling objects on Earth (by GalileoGalileo). But for all their simple beauty, these were only descriptions; with his law of motion, Newton sought a mechanism.