Ex_vector_components - Introduction Physics provides...

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Introduction Physics provides quantitative explanations to the basic phenomena in our universe based on experimental observations and mathematical analyses. Physics approach: observations building an idealized model with assumptions and simplifications establishing theories in mathematical equations validating theories by experiments Units and Standards: We work with SI system in this course. In mechanics, there are four fundamental units: Time – sec, Length – m, Mass – Kg, and Temperature – K. Significant figures: Present your final answers with 3 sigfigs. Vectors: magnitude and direction. Vector addition obeys parallelogram law. Rectangular components of a vector in a 2-D Cartesian coordinate system ˆˆ x yx y V V iV j =+= + GGG VV V V x V y x y θ 22 cos , sin , tan xy y x V V V θ == =+ = Example
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