The center of mass of a cuboid with three semiaxes

,

,

and the mass density ρ

) lies in the coordinate origin. The coordinates

,

,

describe the observation points running over the whole space

. The gravitational potential

at all observation points

,

,

is a function of

,

,

. The force vector

for all observation points at

,

,

is computed. The potential of the cuboid at the center of the mass is

. The potential at the corner of the cuboid is

. The potential and the force vector can be computed at all observation points in and outside the cuboid. The angle between the force and the space vector is very much near

with the uncertainty of

. The angular momentum of a particle in the gravitational field of the cuboid is time dependent and the motion is not in a two-dimensional plain near the cuboid. The potential

is displayed as a contour plot for the observation points

at any arbitrary

,

,

,

. The

,

components of the force are displayed as a vector field plot.