9/23/200811Vectors2D motion2VECTORS have magnitudeplus directionThree ways of representation1. Graphically as arrow2. As letter capped by arrow A3. As boldfaceletterA3VECTORSVectors are equal ONLYif they have the same magnitude and direction (and represent the same quantity).It does not matter that they are drawn at different places.4To ADDvectors use tip-to-tail method:AABA+BBVECTORS5ABTo SUBTRACTa vector add its negative:A -B = A + (-B)B-BA-BA-BVECTORS6Multiplying a vector by a scalar numberA2A-0.5AVECTORS
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