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principle of inertia discovered
Galileo Galileo discovers the principle of inertia, building the stage for a rational view of motion. -
Earths Magnetic Poles
William Gilbert finds that Earth has magnetic poles and acts like a huge magnet. -
Law of Motion
Galileo Galilei finds that the laws of motion are the same in all inertial reference frames. -
Force of Spring and Elastic
Robert Hooke discovers that the extension of a spring or elastic material is directly proportional to the applied force.
