A solid sphere of mass 'M' and radius 'a' is surrounded by a uniform concentric spherical shell of thickness `3a` and mass `3M`. The gravitational field at a distance `4a` from the Centre will be

A solid sphere of mass 'M' and radius 'a' is surrounded by a uniform concentric spherical shell of thickness 2a and mass 2M. The gravitational field at distance '3a' from the centre will be :

A solid sphere of radius a and mass m is surrounded by cocentric spherical shell of thickness 2a and mass 2m the gravitational field at a distance 3a from their centres is

A uniform solid sphere of mass M and radius a is surrounded symmetrically by a uniform thin spherical shell of equal mass and radius 2a. Find the gravitational field at a distance a). 3/2 a from the centre , b). 5/2 as from the centre.

A uniform solid sphere of mass M and radius a is surrounded symmetrically by a uniform thin spherical shell of equal mass and radius 2a.Find the gravitational field at a distance a. 3/2 a from the center , b. 5/2 a from the center.

A uniform solid sphere of mass m and radius r is suspended symmetrically by a uniform thin spherical shell of radius 2r and mass m .

A uniform sphere of mass M and radius R is surrounded by a concentric spherical shell of same mass but radius 2R. A point mass is kept at a distance x ( gt R) in the region bounded by spheres as shown in the figure . The net gravitational force on the particle is

A particle of mass M is placed at the centre of a uniform spherical shell of equal mass and radius a. Find the gravitational potential at a point P at a distance a/2 from the centre.

A particle of mass M is placed at the centre of a uniform spherical shell of equal mass and radius a. Find the gravitational potential at a point P at a distance a/2 from the centre.

A particle of mass M is placed at the centre of a uniform spherical shell of equal mass and radius a. Find the gravitational potential at a point P at a distance a/2 from the center.

A solid sphere of mass M and radius R is surrounded by a spherical shell of same mass M and radius 2R as shown. A small particle of mass m is released from rest from a height h(ltltR) above the shell. There is a hole in the shell. What time will it take to move from A to B?