A solid wall, oriented with its unit normal vector pointing in the y$-$direction, sits motionless beneath an infinite ocean of a constant density, Newtonian fluid. Suddenly, a graduate student exerts a specified stress Sxy $=$ on the wall! The fluid begins to move! What are the simplified equations of motion and the boundary conditions that govern the viscous stress and velocity in the fluid? Use the method of characteristic quantities to make the equations dimensionless. Is there a similarity solution? If so$,$ determine the governing differential equation and boundary conditions. You do not need to solve the differential equation.