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Attraction varies proportionally with the masses and inversely proportionally with the square of the distance separating the two objects. Newton said it like this:F = G (m1m2)/r2


Where:

F is force

G is the universal gravitational constant

m1and m2are the masses of the two objects in question, and

r is the radius or distance between the centers of gravity of the two objects.


If you use meters and kilograms, your force will be in Newtons.

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