A horizontal force of 1 N is required to move a meal plate of area `10^-2 m^2` with a velocity of `2xx10^-2 m//s`, when it rests on a layer of oil `1.5xx10^-3` m thick. Find the coefficient of viscosity of oil.

The force of 2000 dyne is required to move a flat glass plate of surface area 10 cm^(2) with a velocity of 1 cm/s over a surface of glycerine 1 mm thick. The coefficient of viscosity of glycerine is

Calculate the force required to move a flat metal plate of area 25cm^2 with a uniform velocity of 20 m//s over the surface of a liquid 1 mm thick if the coefficient of viscosity (n) is 2 Ns//m^2

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) )

A body moves with a velocity of 10 m/s for 10 s and then with a velocity of 20 m/s in the same direction for 40 s. Find its average velocity.

A marble block of mass 2 kg lying on ice when given a velocity of 6m//s is stopped by friction in 10s. Then the coefficient of friction is

Calculate the viscous force acting on a rain drop of diameter 1mm, falling with a uniform velocity 2 m//s through air. The coefficient of viscosity of air is 1.8 xx 10^-5 Ns//m^2 .

A charged paricle moving with a velocity of 2xx10^7m//s making an angle of 30^@ with a uniform field of 3.5xx10^-4T experiences a force of 0.07 N. find the charge.

What will be the approximate terminal velocity of a rain drop of diamteter 1.8xx 10^(-3)m, when density of rain water ~~10^(3)kgm^(-3) and the co-efficient of viscosity of air ~~1.8xx10^(-5)Nsm^(-2) ? (Neglect buoyancy of air. )