The position of an object is its location relative to a reference point . Position is a vector quantity. Displacement is the change in position of an object in a specified direction. Displacement is a vector quantity. It does not require a reference point.
Equivalent displacements can have different origins.
They must have the same magnitude and the same direction. In one dimension, displacement can be determined using a number line . Adding one dimensional vectors on a number line, with vector diagrams, or algebraically, yields the resultant displacement vector. To subtract one vector from another, change the direction of the vector being subtracted and then proceedas with vector addition. A negative vector points in the opposite direction of a positive vector.