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Lecture Notes

College Physics: A Strategic Approach with Mastering Physics

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9/23/2008 1 1 Vectors 2D motion 2 VECTORS have magnitude plus direction Three ways of representation 1. Graphically as arrow 2. As letter capped by arrow A 3. As boldface letter A 3 VECTORS Vectors are equal ONLY if they have the same magnitude and direction (and represent the same quantity). It does not matter that they are drawn at different places. 4 To ADD vectors use tip-to-tail method: A A B A+B B VECTORS 5 A B To SUBTRACT a vector add its negative: A - B = A + (-B) B -B A -B A - B VECTORS 6 Multiplying a vector by a scalar number A 2 A - 0.5 A VECTORS
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