Answer:
c-Yes, if the two vectors are in the same direction.
e. Yes, if one of the vectors is zero.
Explanation:
Lets take
The magnitude of the two vectors are A and B and they are at angle θ
Then the Sum of these two vectors
[tex]\bar{R}=\bar{A}+\bar{B}[/tex]
Resultant R
[tex]R=\sqrt{A^2+B^2+2ABcos\theta}[/tex]
if the angle between these vectors is zero.It means that they are in the same direction.
θ = 0
[tex]R=\sqrt{A^2+B^2+2ABcos0}[/tex]
[tex]R=\sqrt{A^2+B^2+2AB}[/tex]
[tex]R=\sqrt{(A+B)^2}[/tex]
R=A+B
If the one vector is zero vector.
Therefore the answer will be C and e.
