Answer:
Not be changed
Option: D
Explanation:
The physical quantity which has both ‘magnitude and direction’ is called vector. These vectors are represented by a line and an arrow, the line represent the magnitude and arrow represent the direction of the physical quantity. The vectors are added and subtracted according to the direction of the vectors.
According to the vector law addition while adding vectors direction and length of the vector is not be changed. If the length of the vector changed the magnitude is also changed while so, while adding vectors length must not be changed.
