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- A vector is a quantity that has both magnitude
- and direction. It differs from a scalar quantity,
- which has magnitude but no associated direction.
- In diagrams, vector quantities are represented by
- arrows with the length of the arrow representing
- the magnitude and thedirection of the arrow
- representing the direction of the quantity.
- A vector can be represented either by boldface
- (v) or with an arrow above the vector name ( ).
- The magnitude of a vector is represented by the
- vector name without boldface or without the arrow
- above. Another representation is the vector name
- in absolute value bars, as in |v|.
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