Since it does not matter in what order vectors are added, A − B is also equal to (− B) + A. Subtracting the vector B from the vector A, which is written as A − B, is the same as A + (− B). A negative vector has the same magnitude as the original vector, but points in the opposite direction (as shown in Figure 5.6). We add the first vector to the negative of the vector that needs to be subtracted. Vector subtraction is done in the same way as vector addition with one small change.
For vertical and horizontal motion, each vector is made up of vertical and horizontal components. In two dimensions, a vector describes motion in two perpendicular directions, such as vertical and horizontal. Motion that is forward, to the right, or upward is usually considered to be positive (+) and motion that is backward, to the left, or downward is usually considered to be negative (−).
COMSOL 5.1 MANUALLY HIGHLIGHT SELECTION GRAPHICALLY PLUS
In one-dimensional or straight-line motion, the direction of a vector can be given simply by a plus or minus sign. For example, displacement, velocity, acceleration, and force are all vectors. Recall that a vector is a quantity that has magnitude and direction. The Graphical Method of Vector Addition and Subtraction