 The position vector of a particle is a vector drawn from the origin of the reference frame to the particle.It expresses both the distance of the point from the origin and its direction from the origin.In three dimensions, the position of point "P" can be expressed as
where formula_2, formula_3, and formula_4 are the Cartesian coordinates and formula_5, formula_6 and formula_7 are the unit vectors along the formula_8, formula_9, and formula_10 coordinate axes, respectively.