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Chapter_3-pre-lecture

Chapter_3-pre-lecture - B A B A = A B A B = • If a vector...

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1    Cartesian or rectangular (x,y) Polar (r, )
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2  What are the polar coordinates of the point ( x,y ) = (-3.50,-2.50) m ?    A scalar quantity is specified by a single value and a unit but has no direction. (eg: temperature, volume, mass, speed, time intervals) A vector quantity is specified by a number, an unit, and a direction . (velocity, displacement)
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3    A generic vector has a magnitude and a direction These four vectors are equal:    Laws of vector addition: A B B A + = + ( ) ( ) C B A C B A + + = + +
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4   
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Unformatted text preview: ( ) B A B A -+ =-( ) A B A B =-+ • If a vector A is multiplied by a positive scalar quantity m , the product vector m A has the same direction and the magnitude mA . • If A is multiplied by –m , the vector –m A is pointing in the opposite direction of A . 5 • Unit vectors have magnitude 1 and have no dimension. • Adding and subtracting arithmetically: 6 • Three dimensions are difficult to draw. • Go arithmetic …...
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