The vector represents the displacement (in metres) of a particle from the origin

MATHEMATICS · Subjective · CBSE · Mathematics · Vector Algebra · Vector Algebra

Problem

The vector

\mathbf{a}=3\,\hat{i}-4\,\hat{j}+12\,\hat{k}

represents the displacement (in metres) of a particle from the origin. (i) Find the magnitude of

\mathbf{a}

. (ii) Determine the unit vector in the direction of

\mathbf{a}