A block of mass m is lying at a distance r from a spherical shell of mass m and radius r, then :

P is a point at a distance r from the centre of a spherical shell of mass M and radius a, where r lt a. The gravitational potential at P is

P is a point at a distance r from the centre of a spherical shell of mass M and radius a, where r lt a . The gravitational potential at P is

A particle of mass m is ocated at a distance r from the centre of shell of mass M and radius R. The force between the shell and mass F (r ) . The plot of F(r ) ve r is :

A particle of mass m is placed at the centre of a unifrom spherical shell of mass 3 m and radius R The gravitational potential on the surface of the shell is .

A particle of mass m is placed at the centre of a unifrom spherical shell of mass 3 m and radius R The gravitational potential on the surface of the shell is .

A point mass m_(0) is placed at distance R//3 from the centre of spherical shell of mass m and radius R. the gravitational force on the point mass m_(0) is