The gravitational force of attraction between a uniform sphere of mass M and a uniform rod of length l and mass in as shown in figure is

find the gravitational force of attraction between a uniform sphere of mass M and a uniform rod of length L and mass m, placed such that r is the distance between the centre of the sphere and the near end of the road.

Find the force of attraction between a solid sphere of mass M and a ring of mass m as shown.

The moment of inertia of a thing uniform rod of length L and mass M , about axis CD (as shown in figure) is

Find the gravitational potential energy of a system consisting of a uniform rod AB of mass M, length l and a point mass m as shown in figure.

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

Find the potential energy of the gravitational interation of a point mass of mass m and a thin uniform rod of mass M and length l, if they are located along a straight line such that the point mass is at a distance 'a' from one end. Also find the force of their interaction.