The two vectors $\vec A = -2\widehat i + \widehat j + 3\widehat k$ and $\vec B = 7\widehat i + 5\widehat j + 3\widehat k$ are :-
Parallel
Perpendicular
Antiparallel
None of the above
If $\vec{P}+\vec{Q}=\vec{P}-\vec{Q}$, then
A particle is simultaneously acted by two forces equal to $4\, N$ and $3 \,N$. The net force on the particle is
Figure shows $ABCDEF$ as a regular hexagon. What is the value of $\overrightarrow {AB} + \overrightarrow {AC} + \overrightarrow {AD} + \overrightarrow {AE} + \overrightarrow {AF} $ (in $\overrightarrow {AO} $)
If the sum of two unit vectors is also a unit vector. then magnitude of their difference and angle between the two given unit vectors is ..............