Yes, but only if the size (length) of the arrow is related to some scale.
Velocity.
The length of the arrow signifies the magnitude or size of the vector.
In short, yes.
A vector.
A vector is represented graphically as an arrow. The direction indicates the direction, the length is proportional to the magnitude of the vector. Note that it is difficult to accurately represent vectors of 3 or more dimensions on a 2-dimensional sheet of paper.
Velocity.
The length of the arrow signifies the magnitude or size of the vector.
In short, yes.
A vector.
A force vector - or just about any physical vector, for that matter - is usually represented as an arrow. The direction of the arrow represents the direction of the vector; the length of the arrow is supposed to be proportional to the force (or to whatever physical quantity you are representing).
By an arrow, a vector. Velocity is a vector quantity that must have both magnitude (speed) and direction (bearing).
A vector is represented graphically as an arrow. The direction indicates the direction, the length is proportional to the magnitude of the vector. Note that it is difficult to accurately represent vectors of 3 or more dimensions on a 2-dimensional sheet of paper.
It is usually represented by a lower case letter with a horizontal arrow above it. In print, the letter will usually be bold.
Vectors are often represented by arrows whose length is proportional to the magnitude of the vector. The arrowhead points to the direction the vector is acting. You'll have to decide if such an arrow fits your definition of a line.
An Arrow can be used to represent a vector by having the direction of the arrow indicate the direction of the vector and the size or length of the arrow represent the size of the vector.
A vector is represented as a sum of its parts.
Yes, a vector can be represented in terms of a unit vector which is in the same direction as the vector. it will be the unit vector in the direction of the vector times the magnitude of the vector.