Which change will always result in an increase in the gravitational force between two objects?

Gravitational force is proportional to the product of the objects’ masses and inversely proportional to the square of the distance between them: F = Gm₁m₂/r². Increasing both masses makes the force larger, and decreasing the distance also makes it larger. Therefore, increasing the masses and decreasing the distance will always increase the gravitational force; the other choices combine changes that can reduce the force.

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