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It was thought that the van der Waals force and gravitational force weredistinct. Now a model is used to describe the attraction between macroscopicobjects according to van der Waals interaction. The force between two objectswith thermal equilibrium deviates from the law of universal gravitationslightly, and the gravity on the earth is explained approximately. We arguethat the gravitational force is the van der Waals force actually. In otherwords, the gravitational force and mass are related to the quantum fluctuationsof electron clouds in atoms, and these parameters are dictated by dielectricsusceptibility.

The van der Waals force and gravitational force in matter