Question

viscous force (F) depends on
1. Coefficient of viscosity(η)
2. Area(A)
3. Velocity Gradient(dx/dv)
Find out the equation of Viscous force
(given η=M L^-1 k^-1)

Answer 1

The viscous drag force can be written as below:

F=η A (dXdV) where, F is viscous drag force (or tangential force)

η is coefficient of viscosity 

A is surface area of layers in contact 

dXdV is velocity gradient

η is property of liquid.

So, we can see that drag is directly proportional to the velocity gradient, surface area and nature of liquid. Drag force acts in opposite direction of liquid flow.  hope this helps you please mark my answer as brainlist and follow me

Answer 2

Explanation:

The viscous force can be calculated by multiplying the shear stress acting on the surface by the fluid and the area. The shear stress caused due to the viscosity of the fluid is directy proportional to the coefficient of viscosity of the fluid and the velocity gradient.