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Unformatted text preview: Lecture 3 Friday 26 August 2011 Chapter 1: Vectors, conclusion Two types of products of two vectors Scalar (or dot) product gives a scalar Vector (or cross) product gives a vector Geometric interpretations of the products ! A ! ! B ! A ! ! B Note: The online homework (Mastering Physics) is a required part of the course, worth 30 course points out of 400. This corresponds to 3/4 of a full letter grade. Please register for it if you have not already done so. Answers: 1. 2. A 2 3. A 1/2 4. A Question Solution Let ! be the angle between two vectors ! A and ! B . Then the angle between the vector ! A and itself is ! = 0. Using the definition of the dot product gives ! A " ! A = AA cos ! = A 2 cos(0) = A 2 ! ! A ! ! A = ____. ( A is the magnitude of ! A ) Answers: 1. 33 2. 95 3. 106 4. 137 Two vectors are given by ! A = 3.00 i + 4.00 j ! B = 3.00 i ! 4.00 j . The angle between !...
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This note was uploaded on 09/05/2011 for the course PHYS 221 taught by Professor Herrerasiklody during the Spring '08 term at Iowa State.
 Spring '08
 HerreraSiklody

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