Aviscous liquid of constant density 500 kg/m3 and viscosity 10 pa s falls down with constant velocity due to gravity in a long vertical tube with 2 m diameter. there is no pressure applied. gravity is the only driving force. calculate the shear stress at the wall.

2452.5 N/m^2

Explanation:

given:

density =500kg/m^3

viscosity = 10 Pa-s

diameter of tube= 2 m

and L be length

since gravity is the only force shear force will balance it

so we can write

mg=

A=  

m=  

therefore

putting values we get

calculating we get 2452.5 N/m^2

true

explanation: