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2vectors_FA10 - 1 Vectors Vectors have both magnitude and...

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Unformatted text preview: 1 Vectors Vectors have both magnitude and direction. Examples: – velocity – force – acceleration – displacement – electric field Scalars are quantities which can be specified by a single number without direction. Examples: – mass 1 – temperature – energy – power Vector Addition • Why two methods? – Graphical Addition • gives quick approximate results keeps track of directions automatically • keeps track of directions automatically • does not require a coordinate system • does not give a precise numerical answer (unless done very carefully) – Component Addition • gives precise numerical answers • is easily adaptable to computer programs (spreadsheets, etc.) 2 • requires a coordinate system • requires care with algebraic signs • Recommendation (for most problems): calculate by components, and also make a drawing to check that answer is reasonable 2 Vector Addition 3 4 3 Vector components You should know how to go back and forth between components and...
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2vectors_FA10 - 1 Vectors Vectors have both magnitude and...

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