Take the case of a box sitting on a table. In an introductory physics course, we

Take the case of a box sitting on a table. In an introductory physics course, we

Take the case of a box sitting on a table. In an introductory physics course, we'd say that there are two forces acting on the box: the force of gravity, pulling it down; and a normal force of precisely equal magnitude, pushing it up. Is there any real difference, though, between saying that there is no net force acting on a body, and saying that no forces are acting on it at all?

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