Avery large plate is placed equidistant between two vertical walls. the 10-mm spacing between the plate and each wall is filled with a liquid of absolute viscosity 1.92 x 10^-3 pa. s. determine the force per unit plate area required to move the plate upward at a speed of 35 mm/s. assume linear variation of velocity between the plate and the walls.

Force per unit plate area is 0.1344

Solution:

As per the question:

The spacing between each wall and the plate, d = 10 mm = 0.01 m

Absolute viscosity of the liquid,

Speed, v = 35 mm/s = 0.035 m/s

Now,

Suppose the drag force that exist between each wall and plate is F and F' respectively:

Net Drag Force = F' + F''

where

= shear stress

A = Cross - sectional Area

Therefore,

Net Drag Force, F =

Also

F =

where

= dynamic coefficient of viscosity

Pressure, P =

Therefore,

answer:

constructing a building's framework requires a solid foundation

explanation: