Vector Products (Cross Product). Torque F r T.

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Vector Products (Cross Product)

Transcript of Vector Products (Cross Product). Torque F r T.

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Vector Products (Cross Product)

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Torque

F

rT

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Vector Products

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Definition of Cross Product

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Interpretation of the Cross Product (from autograph)

a

ba x b

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A small proof…

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Small proof continued..

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The vector CROSS product

• Results in a NEW vector!

As seen on the formula booklet

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Some examples

• .

But…..you do not NEED to know the matrix algebra, you just need to know how to use the IB formula.

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You try!

• Use the IB formula this time:

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• .

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Applications of the Cross Product

• Constructing Orthogonal Vectors

• Area of a Triangle or a Parallelogram

• Volume of a Parallelepiped

• Moment of Force

• Angular Velocity

• Magnetic and Electric Fields

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Cross Product of Unit Vectors

x

y

z

i

jk

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Properties of the Cross Product

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Cautions

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Coordinate Formula

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Application

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Scalar Triple Product

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Application