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. Author manuscript; available in PMC: 2011 Jul 1.
Published in final edited form as: Motor Control. 2010 Jul;14(3):e41–e53. doi: 10.1123/mcj.14.3.e41

Figure 1.

Figure 1

A: The physical account of the Coulomb law. An electron creates an electric field. Another electron experiences a force with the magnitude proportional to the charge and to the strength of the field. B: A control-theoretical (computational) account. An electron gets information on the charge and distance from the other electron, computes the force to be applied to the other electron (FPLAN) and sends a corresponding signal to an actuator, which transforms the symbolic FPLAN into physical force acting on the other electron.