Which of the following is independent of the choice of co-ordinate system
$\vec P + \vec Q + \vec R$
$({P_x} + {Q_x} + {R_x})\hat i$
${P_x}\hat i + {Q_y}\hat j + {R_z}\hat k$
None of these
The resultant of two vectors at an angle $150^{\circ}$ is $10$ units and is perpendicular to one vector. The magnitude of the smaller vector is ....... units
The position vector of a particle is determined by the expression $\vec r = 3{t^2}\hat i + 4{t^2}\hat j + 7\hat k$ The distance traversed in first $10 \,sec$ is........ $m$
If $\vec{P}+\vec{Q}=\overrightarrow{0}$, then which of the following is necessarily true?
What vector must be added to the two vectors $\hat i - 2\hat j + 2\hat k$ and $2\hat i + \hat j - \hat k,$ so that the resultant may be a unit vector along $X-$axis