When the angle between the two vectors are not a multiple of 180 degrees.
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The condition is the two vectors are perpendicular to each other.
To add two vectors that aren't parallel or perpindicular you resolve both of the planes displacement vectors into "x' and "y" components and then add the components together. (parallelogram technique graphically)
To add two vectors that aren't parallel or perpindicular you resolve both of the planes displacement vectors into "x' and "y" components and then add the components together. (parallelogram technique graphically)AnswerResolve both of the planes displacement vectors into x and y components and then add the components
You get a third vector.
The law is used to add vectors to find the resultant of two or more vectors acting at a point.