The velocity distribution for fluid flow over a flat plate is given by u=2y-6y2 in which u is the velocity in metre per second at a distance of y metre above the plate. Determine the shear stress at y=0.15m.Take dynamic viscosity of fluid as 8.6 poise.

The velocity distribution for fluid flow over a flat plate is given by

1.	The velocity distribution for fluid flow over a flat plate is given by u=2y-6y2 in which u is the velocity in metre per second at a distance of y metre above the plate. Determine the shear stress at y=0.15m.Take dynamic viscosity of fluid as 8.6 poise.
A.	0.172 N/m<sup>2</sup>
B.	0.344 N/m<sup>2</sup>
C.	0.086 N/m<sup>2</sup>
D.	None of the mentioned
Answer» B. 0.344 N/m<sup>2</sup>