According to univarsal law of gravity every objet attracts each other than why does the chair and table in a room do not colide???

 Gravitational force is the weakest force in nature, yet it helps in holding massive bodies in place throughout the universe. Due to this reason, table and chair do not collide.
lets a example 
when two books are kept on the table how less their mass is and so their distance. In fact it is negligible on the earth because when earth's gravity attracts any book it doesn't changes with the change of mass or distance of the book. That's why the force books are applying is feeble and can be considered negligible. 

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