Every object attracts every other object with a force directly proportional to product of masses and inversely proportional to square of distance. F = Gmโmโ/rยฒ. G = 6.674ร10โปยนยน Nโ mยฒ/kgยฒ (gravitational constant). This force acts along the line joining the two objects. It's always attractive, never repulsive.
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