Two methods can be used for vector addition. (1) Graphically. Place the vectors head-to-tail, without changing their direction or size. (2) Analytically, that is, mathematically. Add the x-component and the y-component separately. The z-component too, if the vectors are in three dimensions.
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NULL VECTOR::::null vector is avector of zero magnitude and arbitrary direction the sum of a vector and its negative vector is a null vector...
The sum of a fraction? Well, to find the sum of the fraction all you do is divide both top and bottom numbers.
The whole point of a vector is that it has a magnitude and a direction. There are no directions given in the above string of numbers.
A vector of 13 acting on O at an angle of 60 degrees.
When the angle between any two component vectors is either zero or 180 degrees.