A sphere is dropped gently into a medium of infinite extent. As the sphere falls, the force acting downwards on it.

A sphere is dropped gently into medium of infinite extent. As the sphere falls, the force acting downwards on it

A lead sphere is dropped into a medium. As the sphere falls, the velocity of lead sphere

A lead sphere is dropped into a medium. As the sphere falls, the velocity of lead sphere

When a metallic sphere is dropped in a long column of a liquid, the motion of the sphere is opposed by the viscous force of the liquid. If the apparent weight of the sphere equals to the retardation forces on it, the sphere moves down with a velocity called.

A sphere has to purely roll upwards. At an instant when the velocity of sphere is v, frictional force acting on it is

A sphere has to purely roll upwards. At an instant when the velocity of sphere is v, frictional force acting on it is

An oil drop of mass m fall through a viscous medium. The viscous drag force. F is proportional to the velocity of the drop . At the instant it begins to fall the force that acts on the oil drop is (neglect buoyancy)

Consider a small sphere falling through a medium. The viscous force acting on the sphere depends upon the radius (r) of the sphere, velocity (V) of the sphere and the co-efficient of viscosity (eta) of the medium. Use dimensional analysis and show that the viscous force is directly proportional to etarv . (Given : Dimensions of eta =[M^1L^-1T^-1]) .

A sphere of density rho is half submerged in a liquid of density sigma and surface tension T. The sphere remains in equilibrium. Find radius of the sphere (assume the force due to surface tension acts tangentially to surface of sphere)

A sphere of density rho is half submerged in a liquid of density sigma and surface tension T. The sphere remains in equilibrium. Find radius of the sphere (assume the force due to surface tension acts tangentially to surface of sphere)