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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.
A contact force, including friction, springs, pushes, pulls, requires the two objects to be in contact for the force to exist. On the other hand, non-contact forces do not req â¦ uire contact; the two objects are separated by space, and yet the force exists.