  Explicit tests are presented of the conjectured entropic origin of the
gravitational force. The gravitational force on a test particle in the vicinity
of the horizon of a large Schwarzschild black hole in arbitrary spacetime
dimensions is obtained as entropic force. The same conclusion can be reached
for the cases of a large electrically charged black hole and a large slowly
rotating Kerr black hole. The generalization along the same lines to a test
mass in the field of an arbitrary spherical star is also studied and found not
to be possible. Our results thus reinforce the argument that the entropic
gravity proposal cannot account for the gravitational force in generic
situations.
