Between Many Objects
More generally, the force of gravity exerted on an object of mass m by N objects of masses mi and at distances ri is equal to the vector sum of all the individual forces, given by the equation:
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“Philosophy, certainly, is some account of truths the fragments and very insignificant parts of which man will practice in this workshop; truths infinite and in harmony with infinity, in respect to which the very objects and ends of the so-called practical philosopher will be mere propositions, like the rest.”
—Henry David Thoreau (1817–1862)