A small ball of mass m and density `rho` is dropped in a viscous liquid of density `sigma`. Ather some time the ball falls with a constant velocity. Calculate the viscous force acting on the ball.

The velocity of a small ball of mass M and density d when dropped in a container filled with glycerine becomes constant after sometime. If the density of glycerine is 'd/2' then the viscous force acting on the ball will be

A tiny sphere of mass m and density x is dropped in a jar of glycerine of density y. When the sphere aquires terminal velocity, the magnitude of the viscous force acting on it is :

A spherical ball of radius r and density d is dropped from rest in a viscous fluid having density rho and coefficient of viscosity eta . (a) Calculate the power (P_(1)) of gravitational force acting on the ball at a time t after it is dropped. (b) Calculate the rate of heat generation (P_(2)) due to rubbing of fluid molecules with the ball, at time t after it is dropped. (c) How do P_(1) and P_(2) change if the radius of the ball were doubled? (d) Find P_(1) and P_(2) when both become equal.

The velocity of small ball of mass M and density ( d_(1)= when dropped a container filled with glycerine becomes constant after some time. If the density glycerine is d_(2) , the viscous force acting on ball is

A spherical ball of density sigma is freely falling in a viscous liquid of density p (p lt sigma). The initial acceleration of the ball will be

A ball of density rho is released from deep inside of a liquid of density 2 rho . It will move up

A ball of density rho is dropped from a height on the suraca of a non-visous liquid of dinsity 2rho . Choose the correct options.

Statement -1 : A tiny shere of mass m and density rho is dropped in a tall jar of glycerine of density rho_(0) . When the sphere acquires terminal velocity v, the magnitude of viscous force is mg(1 - rho_(0)//rho) . Statement -2 : Viscous force on the body falling in a medium is F =6 pi eta r v , where eta is the coeff. of viscosity of medium and r is the radius of body