Let $\vec { n }$ Be the Unit Normal Vector of S

True/False

Let $\vec { n }$ be the unit normal vector of S.If the angle between $\vec{F}$ and $\vec { n }$ is less than $\pi$ /2 at each point of the surface, then $\int _ { S } \vec { F } \cdot \overrightarrow { d A } \geq 0$