# week3-1 - Some Facts about the Motion? To move a heavy...

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Unformatted text preview: Some Facts about the Motion? To move a heavy chair, you need to push and apply Force . After you stop pushing, the chair stops. After a gentle push, the kid start to move He will continue moving without being pushed any further. A bit of history: Aristotles View on the Cause of Motion A force is needed to keep an object moving. Air rushing around a thrown object continues to push the object forward. A bit of history: Galileos Contribution Galileo challenged Aristotles ideas that had been widely accepted for many centuries. He argued that the natural tendency of a moving object is to continue moving. No force is needed to keep an object moving This goes against what we seem to experience. A bit of history: Newtons Contribution Newton built on Galileos work, expanding it. He developed a comprehensive theory of motion that replaced Aristotles ideas. Newtons theory is still widely used to explain ordinary motions. Newtons First Law of Motion An object remains at rest, or in uniform motion in a straight line, unless it is compelled to change by an externally imposed force. Newtons Second Law of Motion The acceleration of an object is directly proportional to the magnitude of the imposed force and inversely proportional to the mass of the object....
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## This note was uploaded on 04/23/2011 for the course PHYS 214 taught by Professor Staff during the Spring '08 term at Purdue University-West Lafayette.

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week3-1 - Some Facts about the Motion? To move a heavy...

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