Question 1201b

Vectors I: Basics, Dot and Cross Products

Unit Vectors

Question

Given that the vector

\mathbf{a} = - \frac{2}{7} \mathbf{i} + \frac{6}{7} \mathbf{j} + p \mathbf{k}

is a unit vector, find

{p}

such that

{p\geq 0.}

{p= }