Chapter 2, Problem 2.7CYU

Check Your Understanding If the average velocity vector of the drone In the displacement in Example 2.7 is $\stackrel{\to }{\text{u}}=\left(15.0\text{<mover accent="true"> <mo> i </mo> <mo> ^ </mo> </mover>}+31.7\text{<mover accent="true"> <mi> j </mi> <mo> ^ </mo> </mover> +2}\text{.5 <mover accent="true"> <mo> k </mo> <mo> ^ </mo> </mover>}\right)\text{m/s}$ , what is the magnitude of the drone’s velocity vector?