# On the existence of exotic matter in classical Newtonian mechanics

@article{Rahman2019OnTE, title={On the existence of exotic matter in classical Newtonian mechanics}, author={Sabbir Rahman}, journal={Modern Physics Letters A}, year={2019} }

According to Newton’s law of gravitation, the force between two particles depends upon their inertial, as well as their active and passive gravitational masses. For ordinary matter, all three of these are equal and positive. We consider here the more general case where these quantities are equal in magnitude for a given particle but can differ in sign. The resulting set of possible interactions allows each particle type to be assigned to one of precisely four different classes, and the results…

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