The gravitational force between two objects decreases by a factor of 1/9 when the distance between them is tripled.
The gravitational force of attraction between two objects varies inversely with the square of the distance between them. If the distance is tripled, the force of attraction will decrease by a factor of 1/9. For example, if the original force was 100 N, when the distance is tripled, the force becomes 100/9 N = 11.11 N.
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