Vectors have magnitude and direction. 2D vectors are represented by directed line segments in the xy-plane. [br][br]They can be given in component form by specifying the amount of horizontal and vertical change from the initial point (tail) to the terminal point (tip). The blue vector [i][b]w[/b][/i] above is manipulated by specifying the two components via the sliders or input boxes. Below these inputs we see the details of computing the magnitude and direction for this vector.[br][br]Vectors can also be determined by specifying a magnitude (length) and direction (angle with the positive portion of the x-axis). The red vector [i][b]u[/b][/i] above is manipulated by specifying the magnitude and direction via the sliders or input boxes. Below these inputs we see the details of computing the component form of this vector.