fluid mechanics

(a) An incompressible steady viscous fluid is flowing over an infinite flat plate. Length of the flat plate is taken along horizontal axes (x-axis). Initially both plate and fluid are at rest. Suddenly, the plate is jerked into motion in its own plane with constant velocity U and the velocity of the fluid far away from the plate (i.e. at y - co) is zero. Also note that all type of body forces are negligible. Sketch and mathematically modeled the given physical situation and then evaluate the possible solution. (b) What is non-coaxial rotation? Also derive the Navier stokes equations for non- coaxial rotation u = wy+ f(z, t), v = wx+ g(z,t), w=0