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 ..............
$\sqrt{3}, 60^{\circ}$
$\sqrt{3}, 120^{\circ}$
$\sqrt{2}, 60^{\circ}$
$\sqrt{2}, 120^{\circ}$
The resultant of two forces, one double the other in magnitude, is perpendicular to the smaller of the two forces. The angle between the two forces is ........ $^o$
$\overrightarrow A \, = \,2\widehat i\, + \,3\widehat j + 4\widehat k$ , $\overrightarrow B \, = \widehat {\,i} - \widehat j + \widehat k$, then find their substraction by algebric method.
Match List$- I$ with List$- II.$
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Choose the correct answer from the options given below :
In the cube of side $a$ shown in the figure, the vector from the central point of the face $ABOD$ to the central point of the face $BEFO$ will be
Give equation to find the value of resultant vector and the direction of two vectors.