[" Example "28." A metal plate "5cm times5cm" rests on a layer of "],[" castor oil "1mm" thick whose coefficient of viscosity is "],[1.55Nsm^(-2)" .Find the horizontal force required to move the "],[" plate with a speed of "2cms^(-1)" ."]

A metal plate 5 cm xx 5 cm rests on a layer of castor oil 1 mm thick whose coefficient of viscosity is 1.55 Nsm^(-2) . Find the horizontal foce required to move the plate with a speed of 2 cm/s

A metal plate 5cmxx5cm rests on layer of castor oil 1mm thick whose coefficient of viscosity is 1.55 Nsm^(-1) . Find the horizontal force required to move the plate with a speed of 2 cm^(-1) .

A circular metal plate of radius 4 cm rests on a layer of castor oil 2 mm thick, whose coefficient of viscosity is 16.5 Nsm^(-2). Calculate the horizontal force required to move the plate with a speed of 3 cm/s.

A circular metal plate of radius 6 cm rests on a layer of caster oil 1.5 mm thick, whose coefficient of viscosity is 15.5 poise. Find the horizontal force (in kg wt) required to move the plate with a speed of 60 ms^(-1) .

A circular metal plate of radius 5 cm, rests on a layer of castor oil 2mm thick, whose coeffeicient of viscosity os 15.5 dyn e cm^(-2)s . Calculate the horizontal force required to move the plate with a speed of 5 cms^(-1) . Also calculate strain rate and shearing stress.

A plate of metal 0.1 m^2 in area rests on a layer of caster oil 0.2 cm thick whose co efficient of viscosity is 15.5 poise. Calculate the horizontal force required to move the plate with a speed of 0.3 m/s.

A plate of metal 10 cm sq. rests on a layer of caster oil 2mm thick whose coefficient of viscosity is 15.5 dyn e cm^(-2)s . Calculate the horizontal force required to move the plate with a speed of 3 cm s^(-1) . Also calculate strain rate and shearing strees.

A metel plate 100 sq cm in area rests on a 2-mm layer of castor oil, whose coefficient of viscosity is 1.55 SI units. Calculate the horizontal force required to move the plate with a speed of 3 cm per second. [Hint: F=-etaA(dv)/(dx)."Here"(dv)/(dx)=(3xx10^(-2)ms^(-1))/(2xx10^(-3))=15s^(-1) .]

A metal plate of area 10^(-3)m^(2) is placed on a liquid layer of thickness 0.8mm . The coefficient of viscosity of that liquid is 24 poise .Then the horizontal force required to move the plate with a velocity of 1cms^(-1) .