Find the minimum force required to drag a hard polythene plate of area `2 m^(2)` on a thin film of oil of thickness `0.25 cm` and `eta= 15` poise. Assume the speed of the plate is `10 cm s^(-1)`.

Calculate the force required to separate the glass plates of area 10^(-2)m^(2) with a film of water 0.05 mm thickness between them (surface tension of water =70xx10^(-3)N//m) )

Calculate the force required to separate the glass plates of area 10^(-2)m^(2) with a film of water 0.05 mm thickness between them (surface tension of water =70xx10^(-3)N//m) )

Calculate the force required to separate the galss plates of area 10^(-2)m^(2) with a film of water 0.05 mm thickness between them (surface tension of waer =70xx10^(-3)N//m) )

Calculate the force required to separate the glass plates of area 10^(-2)m^(2) with a film of water 0.05 mm thickness between them (surface tension of water =70xx10^(-3)N//m) )

Calculate the force required to separate the glass plate of area of 10cm^(2) with a film of water 0.05 mm. (Surface tension of water is 70xx10^(-3)N//m )

Calculate the force required to separate the glass plate of area of 10cm^(2) with a film of water 0.05 mm. (Surface tension of water is 70xx10^(-3)N//m )

A metal plate of area 500 cm^92) is kept on a horizontal surface with a layer of oil of thickness 0.5 mm between them. The horizontal force required to drag the plate with a velocity of 2 cm/s is (coefficient of viscosity =0.9 kg/ms)

A metal plate of area 500 cm^92) is kept on a horizontal surface with a layer of oil of thickness 0.5 mm between them. The horizontal force required to drag the plate with a velocity of 2 cm/s is (coefficient of viscosity =0.9 kg/ms)