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W1.4 - Physics for Scientists Engineers 1 Fall Semester...

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January 8, 2008 1 Engineers 1 Engineers 1 Fall Semester 2007 Lecture 4
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January 8, 2008 2 Clicker Registration Clicker Registration 1. Open battery compartment and take out the 9V battery. 2. Go to msu.lon-capa.org and log in with your MSU user-ID and password
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January 8, 2008 3 Clicker Registration (2) Clicker Registration (2) 237834
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January 8, 2008 4 Vectors Vectors Vectors are heavily used in physics Need to be able to manipulate them without any difficulty Vector Beginning and end point Characterized by: Magnitude Direction Unit Remark: a quantity defined without a direction is a scalar Example: temperature C !
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January 8, 2008 5 Cartesian Coordinate system (in 2d) Cartesian Coordinate system (in 2d) Used as a representation of vectors Quantifies a direction in 2-dimensional space Two perpendicular directions x to the right, y upward Position of point P specified by are positive or negative real numbers ( P x , P y ) ( , ) x y P P
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January 8, 2008 6 Cartesian Coordinate system (1d) Cartesian Coordinate system (1d) We can also have situations in which we need to specify one- dimensional vectors Note that it matters on which side of the origin the point P is located. (Here P x < 0 )
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W1.4 - Physics for Scientists Engineers 1 Fall Semester...

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