Vectors are mathematical quantities used to represent concepts such as force or velocity which have both a magnitude and a direction.
Addition of two Vectors
The addition of two vectors A(v1 , v2) and B (u1 , u2) gives vector
A + B = < v1 + u1 , v2 + u2>
Below is an html5 applets that may be used to understand the geometrical explanation of the addition of two vectors. Enter components of vectors A and B and use buttons to draw, add, zoom in and out as well as translate the system of axes.
More pages and references related to vectors.
vector subtraction; html5 applet to explore the geometrical meaning of subtraction of vectors.
More on vectors.