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Gravity is the force of attraction whcih exists between all matter in the universe. Its strength is inversely proportional to the square of the distance between the two parti â¦ cles of matter.
Van der Waals force. Van der Waals forces include attraction and repulsions between atoms, molecules, and surfaces, as well as other intermolecular forces. They differ from covalent and ionic bonding in that they are caused by correlations in the fluctuating polarizations of nearby particles (a consequence of quantum dynamics[5]).