Regarding the uni-directional steady flow of water between two parallel plates as shown below, the bottom plate is fixed and the top plate moves with constant velocity as shown in the figure. The pressures measured at sections 1 and 2 are 400 kPa and 350 kPa , respectively. Determine the magnitude of the velocity of the upper plate such that the net volumetric flow rate between the two plates is zero. The viscosity of water is 0.001Ns//m^(2).