The velocity distribution for laminar flow between parallel plates is given by u umax = 1 − ( 2y h ) 2 Where h is the distance separating the plates and the origin is placed midway between the plates. Consider a flow of water at 150C, with umax = 0.10 m ∕ s and h = 0.1mm. Calculate the shear stress on the upper plate and give its direction. Sketch the variation of shear stress across the channel.