Projectiles After Being Separated from Their Impeller Are Not Moved Forwards by the Fluid Environment in Which They Are

Abstract

As mentioned above, it is obvious that some bodies are moved by an external and separate motor. One usually searches for what this moving cause does essentially or what effect it provokes in nature. We observe that bodies which move, are impelled, sustain a blow from an external motor, not only are agitated by a movement while being connected to the moving body itself and are led by the latter as if it were by a hand, but, even after withdrawal of the external mover, the moved bodies themselves, left without a guide, continue the movement which was begun. They thus seem to have acquired instruction, discipline, and even force and faculty to be able to complete the movement. Since the subsequent movement also results from another cause rather than from nothing, it is commonly inferred that the cause and the motive force by which the subsequent movement can be completed and continued, remain in the projectile after this was left by the impeller.