3. The "no-slip" condition means that a fluid "sticks" to a solid surface. This is true for both fixed and moving surfaces. Let two layers of fluid be dragged along

by the motion of an upper plate as shown in Fig.3. The bottom plate is stationary. The top fluid puts a shear stress on the upper plate,and the lower fluid puts a shear stress on the bottom plate. Determine the ratio of these two shear stresses. Determine the shear stress acting on the interface of the two fluids. [Answer:1; 6.0 Pa]