The figure shows a spherical shell of mass `M`. The point `a` is not at the centre but away from the centre of the shell. If a particle of mass `m` is placed at `A`, then

Figure shows a hemispherical shell of mass M and radius R and a concentric shell of mass m and radius 3R/4.

A thin uniform spherical shell of mass M and radius R is held fixed . There is a small hole punched in the shell. A particle of mass m is released from rest at a distance R from the hole along a line that passes through the hole and also through the centre of the shell. The particle starts moving towards the centre of shell only due to gravitational attraction. Find the time taken by the particle to reach the diagonally opposite end of the shell.

A particle of mass m is placed inside a spherical shell, away from its centre. The mass of the shell is M.

A particle of mass m is placed inside a spherical shell, away from its centre. The mass of the shell is M.

A solid sphere of mass m and radius r is placed inside a hollow thin spherical shell of mass M and radius R as shown in the figure. A particle of mass m' is placed on the line joining the two centres at a distance x from the point of contact of the sphere and the shell. Find the magnitude of the resultant gravitational force on this particle due to the sphere and the shell if rltxlt2r

A solid sphere of mass m and radius r is placed inside a hollow thin spherical shell of mass M and radius R as shown in the figure. A particle of mass m' is placed on the line joining the two centres at a distance x from the point of contact of the sphere and the shell. Find the magnitude of the resultant gravitational force on this particle due to the sphere and the shell if xgt2R