Fields of Force
The next step in gaining an insight into the character of Newtonian attraction will be to think of the forces at all points of Space as a whole, rather than to fix attention on the forces at isolated points. When a force is defined at every point of Space, or at every point of a portion of Space, we have what is known as a field of force. Thus, an attracting body determines a field of force. Analytically, a force field amounts to three functions (the components of the force) of three variables (the coördinates of the point).
KeywordsVector Field Velocity Field Field Line Closed Surface Divergence Theorem
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