A boundary layer develops due to a two-dimensional steady flow over a horizontal flat plate. Consider a vertical line away from the leading edge which extends from the wall to the edge of the boundary layer. Which of the following quantity/quantities is/are not constant along the vertical line? $u$ and $v$ represent the components of velocity in the direction along the plate and normal to it, respectively and $x$ is taken along the length of the plate while $p$ is the pressure.
Neglect body forces.
- $u$
- $\frac{\partial u}{\partial x}$
- $v$
- $p$
