Question

The shear stress at a point in a liquid is found to be 0.03 N/m^2. The velocity gradient at the point is 0.15 s^-1. What will be it’s viscosity (in Poise)?

(a) 20

(b) 2

(c) 0.2

(d) 0.5

The question was asked in my homework.

The query is from Viscosity in division Properties of Fluids of Fluid Mechanics

Answer 1

Correct answer is (b) 2

The best explanation: where F= viscous force, A= area, du ⁄ dx = velocity gradient, μ = co-effcient of viscosity. Therefore,