Einstein’s General Relativity Theory provided an explanation for the source of the attraction between Massive Bodies, which was unexplained, even though Newton’s Universal Gravitational Law provided the magnitude of the attraction force and the direction of this force between two Massive Bodies. Einstein’s General Relativity Theory used the observation that Newton’s Gravitational Field is also a form of acceleration, and it used this observation to introduce Einstein’s Interwoven Space/Time notion, which explained the source of the attraction between Massive Bodies.However, the source of the attraction or the repulsion between Electrically Charged bodies is still a mystery today, even though the structures of Newton’s Universal Gravitational Law, and Coulomb’s Law, are identical.This paper provides the prediction that Electric (or Magnetic) Fields are also forms of acceleration.Based on this prediction, a paper published by the author of this paper, expands Einstein’s General Relativity Theory to include Electrically Charged Bodies in addition to Massive Bodies, which also provides an explanation to the source of the attraction or the repulsion between Electrically Charged bodies.However, the prediction that Electric (or Magnetic) Fields are also forms of acceleration also implies that the acceleration between two Electrically Charged bodies, attracted to, or repelled from each other, according to Coulomb’s Law, is mainly dependent on the magnitudes of the Electric Charges that these bodies carry and not on the magnitudes of the Mass that these bodies embed, as Newton’s Second Law of Motion predicts.Thus, if the prediction, that Electric (or Magnetic) Fields are also forms of acceleration will be found correct, Newton’s Second Law of Motion would require a suitable modification.This paper also proposes a physical experiment which might prove (or disprove) the prediction provided by this paper, that Electric (or Magnetic) Fields are also forms of acceleration, which might prove (or disprove) what is presented in this paper.