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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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This note was uploaded on 11/22/2010 for the course PHYS 1146 taught by Professor Balasubramamaheswaran during the Spring '10 term at Northeastern.
 Spring '10
 BalasubramaMaheswaran
 Physics

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