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Unformatted text preview: Â§ Introduction â€¢ Physics provides quantitative explanations to the basic phenomena in our universe based on experimental observations and mathematical analyses . â€¢ Physics approach: observations â†’ building an idealized model with assumptions and simplifications â†’ establishing theories in mathematical equations â†’ validating theories by experiments â€¢ Units and Standards: An equation must be dimensionally consistent, and watch for unit consistency in numerical computations. We work with SI system in this course. In mechanics, there are four fundamental units: Time â€“ sec, Length â€“ m, Mass â€“ Kg, and Temperature â€“ K . â€¢ Significant figures: Keep all digits on your calculator in the intermediate computations, and present your final answers with 3 sigfigs . Â§ Vectors â€“ Brief review Definition of vector: A vector quantity has a magnitude and a direction. The length of the line segment represents the magnitude of the vector and in 2D its direction is defined by an angle measured from some...
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This note was uploaded on 03/19/2008 for the course PHYS 2305 taught by Professor Tschang during the Spring '08 term at Virginia Tech.
 Spring '08
 TSChang
 Physics

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