202 Lecture 5

202 Lecture 5 - Motion Misconceptions about motion...

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Motion Misconceptions about motion (Aristotelian Mechanics) o If there is no force on an object, the object is at rest or will immediately come to rest. o Motion requires a force: force causes motion. In most cases, speed is proportional to force. The force may have to “overcome” an obstacle, such as friction, before the motion begins. o Active agents impart an impetus to an object that causes the object to continue to move after the agent is removed. o Celestial bodies move in perfect, uniform, circular motion. o Aristotle assumed that the nature of motion had to do with the nature of the object (terrestrial/celestial) Newtonian Mechanics (the correct description of motion) o Objects are set in motion or change their velocity due to the interactions of other objects with them. Newton described these interactions as Forces. o In Newtonian Mechanics, objects accelerate due to net, external, Forces. o
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This note was uploaded on 12/09/2009 for the course CS 431,430,48 taught by Professor Scher,statica during the Spring '09 term at NJIT.

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202 Lecture 5 - Motion Misconceptions about motion...

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