The velocity distribution in a laminar flow adjacent to a solid wall is given by u = 3.0 sin (5πy). The viscosity of the fluid is 5 poise. What is the shear stress at a section (i) y = 0.05 m; (ii) y = 0.12 m?

• A. 16.7 N / m2 and 7.3 N / m2
• B. 33.4 N / m2 and Zero
• C. 16.7 N / m2 and 12.3 N / m2
• D. 16.7 N / m2 and Zero