PROBLEM 3: Air is flowing over a thin flat plate which is 1 m long and 0.3 m wide. At the leading edge, the flow is assumed to be uniform and U = 30 m/s. The flow condition is independent of z. Using the control volume abcd, calculate the mass flow rate across the surface ab. Determine the magnitude and direction of the x component of force required to hold the plate stationary. The velocity profile at be is given by U -- G)-(G)* = 2 U and 8 = 4 mm. Density of air = 1.23 kg/m and v= 1.5 x 105 m/sec. U.. x C Fig. Control volume of interest on flat plate