Which statement is true about gravitational force?

• A. Gravity is the force that pulls objects toward the center of the Earth only.
• B. Gravitational force depends only on distance.
• C. Gravity can be repulsive.
• D. Two objects always exert gravitational force on each other.

Answer: (D)

Gravity is a mutual attraction between any two masses that pulls each toward the other, along the line connecting their centers. The strength depends on both objects’ masses and their distance apart, described by F = G m1 m2 / r^2, so bigger masses pull harder and the force fades with distance. This force isn’t limited to the Earth; any two masses experience it. It is an attractive force in ordinary situations, not a repulsive one. Because the pull is mutual, each object exerts the same magnitude of force on the other, so two objects always exert gravitational forces on each other.