Gravitational force exerted on the point mass with the rod

Gravitational force exerted on the point mass with the rod

Gravitational force exerted on the point mass with the rod

Physics
Compute the gravitational potential due to a thin rod of length L and mass M at a
distance R from the center of the rod and in a direction perpendicular to the rod.
Secondly, consider a point mass located at a distance D from the nearest end of a
thin rod of length L and mass M along the axis of the rod. Discover the
gravitational force exerted on the point mass with the rod.