Answer
(b)
Work Step by Step
By definition, the normal component of ${\bf{F}}$ is ${\bf{F}}\cdot{\bf{n}}$, where ${\bf{n}} = {\bf{n}}\left( {u,v} \right) = \dfrac{{{\bf{N}}\left( {u,v} \right)}}{{||{\bf{N}}\left( {u,v} \right)||}}$. So, the answer is (b).
