Abstract

Inertia causes all macro bodies to respond sluggishly to external efforts. Three-dimensional matter bodies are inert and they have no ability to move, act or oppose external efforts. However, since no other entity that can prevent instantaneous effects on a 3D matter body by an external effort or maintain constant state of motion of a macro body is known, the phenomenon of inertia is attributed to matter itself, in negative sense. Phenomenon of inertia rightly belongs to the universal medium, which encompasses all 3D matter bodies in entire universe. Inertia is the property of universal medium due to its latticework structure. Only when the mechanism of action of external effort and mechanism of motion of 3D matter bodies are understood, nature of inertia will be clear. All actions in nature are understood by inertial motions/deformations of 3D macro bodies. They have definite mechanism. Motion/deformation of a macro body is the result of additional work-done in the universal medium about the macro body. Mechanism of inertial motion consists of simple rearrangement of constituent "quanta of matter" in the universal medium, about a macro body, to create traveling distortions in the universal medium. Force is the rate of additional work-done about a body with respect to body's acceleration. Forces being mathematical concepts (rates of work), all natural forces are similar. Classifying natural forces, according to their manifestations, does not make any difference in their mechanism of actions or nature of results.