If and , determine the positive scalar such that…

MATHEMATICS · Single correct · CBSE · Mathematics · Vector Algebra · Vector Algebra

Problem

|\mathbf{a}|=7

and

|\mathbf{b}|=5

, determine the positive scalar

k

such that

|k\mathbf{a}|=|\mathbf{b}|

. (a)

\dfrac{7}{5}

(b)

\dfrac{25}{49}

(c)

\dfrac{5}{7}

(d)

\dfrac{25}{7}