The characteristics of a vector are the magnitude, the orientation, and the
sense. The magnitude of a vector is specified by a positive number and a unit
having appropriate dimensions. No unit is stated if the dimensions are those
of a pure number. The orientation of a vector is specified by the relationship
between the vector and given reference lines and/or planes. The sense of a
vector is specified by the order of two points on a line parallel to the vector.
Orientation and sense together determine the direction of a vector. The line
of action of a vector is a hypothetical infinite straight line collinear with the
vector. Vectors are denoted by bold face letters, e.g., a, b, A, B, CD. The
symbol |v| represents the magnitude (or module, or absolute value) of the
vector v. The vectors are depicted either by straight or curved arrows. A
vector represented by a straight arrow has the direction indicated by the
arrow. The direction of a vector represented by a curved arrow is the same
as the direction in which the right-handed screw moves when the screw’s axis
is normal to the plane in which the arrow is drawn and the screw is rotated
as indicated by the arrow.
The characteristics of a vector are the magnitude, the orientation, and the
sense. The magnitude of a vector is specified by a positive number and a unit
having appropriate dimensions. No unit is stated if the dimensions are those
of a pure number. The orientation of a vector is specified by the relationship
between the vector and given reference lines and/or planes. The sense of a
vector is specified by the order of two points on a line parallel to the vector.
Orientation and sense together determine the direction of a vector. The line
of action of a vector is a hypothetical infinite straight line collinear with the
vector. Vectors are denoted by bold face letters, e.g., a, b, A, B, CD. The
symbol |v| represents the magnitude (or module, or absolute value) of the
vector v. The vectors are depicted either by straight or curved arrows. A
vector represented by a straight arrow has the direction indicated by the
arrow. The direction of a vector represented by a curved arrow is the same
as the direction in which the right-handed screw moves when the screw’s axis
is normal to the plane in which the arrow is drawn and the screw is rotated
as indicated by the arrow.
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