at 120 degree
Yes.
Two vectors: no. Three vectors: yes.
Yes.
Two vectors, no; three vectors yes.
Two - if you add two vectors of equal magnitude but in opposite directions, the resultant vector is zero.
Yes.
Two vectors: no. Three vectors: yes.
Yes.
Two vectors, no; three vectors yes.
Two - if you add two vectors of equal magnitude but in opposite directions, the resultant vector is zero.
You forgot to mention that the two original vectors have equal magnitudes. Orient them so that their directions are 120 degrees apart.
Yes, put the three vectors in a plane, with a separation of 120 degrees between each vector and each of the other vectors.
By all means. Using Newton's third law (f=ma) Multiply the vectors by 0 and you're home
The only way that two vectors add up to zero is if they have equal magnitude and opposite direction. If the magnitudes are not equal then no, they cannot give a zero resultant.
Yes, if they are pointing in opposite directions (separated by 180°).
Assuming you want non-zero vectors, two opposing vectors will give a resultant of zero.
a resultant vector