When $n$ vectors of different magnitudes are added, we get a null vector. Then the value of $n$ cannot be
$11$
$4$
$3$
$2$
If $\left| {{{\vec v}_1} + {{\vec v}_2}} \right| = \left| {{{\vec v}_1} - {{\vec v}_2}} \right|$ and ${{{\vec v}_1}}$ and ${{{\vec v}_2}}$ are finite, then
A person moved from $A$ to $B$ on a circular path as shown in figure. If the distance travelled by him is $60 \,m$, then the magnitude of displacement would be$.....\,m$ (Given $\left.\cos 135^{\circ}=-0.7\right)$
If $| A + B |=| A |+| B |$ the angle between $\overrightarrow A $and $\overrightarrow B $ is ....... $^o$
If $\vec{P}+\vec{Q}=\overrightarrow{0}$, then which of the following is necessarily true?
The vectors $5i + 8j$ and $2i + 7j$ are added. The magnitude of the sum of these vector is