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the coulomb force and the newtonian law of gravity have the same structure:

[tex]F_C=\frac{q_1q_2}{R^2}[/tex] and [tex]F_G=\frac{m_1m_2}{R^2}[/tex].

so why isn't there an equivalent to the magnetic force in gravitation? so that one could imagine a law of the same structure as the biot-savart law for gravitation. is there something like that? and when not, why? what is so different in gravitation?

[tex]F_C=\frac{q_1q_2}{R^2}[/tex] and [tex]F_G=\frac{m_1m_2}{R^2}[/tex].

so why isn't there an equivalent to the magnetic force in gravitation? so that one could imagine a law of the same structure as the biot-savart law for gravitation. is there something like that? and when not, why? what is so different in gravitation?

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