A uniform ring of mas m and radius a is placed directly above a uniform sphere of mass M and of equal radius. The centre of the ring is at a distance `sqrt3` a from the centre of the sphere. Find the gravitational force exerted by the sphere on the ring.

A uniform rig of mas m and radius a is placed directly above a uniform sphre of mass M and of equyal radius. The centre of the ring is at a distance sqrt3 a from the centre of the sphere. Find the gravitational foerce exerted by the sphere on the ring.

A uniform ring of mass M and radius R is placed directly above a uniform sphere of mass 8M and of same radius R. The centre of the ring is at a distance of d = sqrt(3)R from the centre of the sphere. The gravitational attraction between the sphere and the ring is

For a uniform ring of mass M and radius R at its centre

The figure represents a solid uniform sphere of mass M and radius R . A spherical cavity of radius r is at a distance a from the centre of the sphere. The gravitational field inside the cavity is

The gravitational field due to an uniform solid sphere of mass M and radius a at the centre of the sphere is

Inside a uniform sphere of density rho there is a spherical cavity whose centre is at a distance l from the centre of the sphere. Find the strength of the gravitational field inside the cavity.

A uniform ring of mass m is lying at a distance sqrt(3) a from the centre of mass M just over the sphere (where a is the radius of the ring as well as that of the sphere). Find the magnitude of gravitational force between them .