Abstract
Even if the fall of heavy bodies results from blows and impulses delivered by the inner motive virtue of the heavy body itself, it is, however, surprising how different this internal percussion is from that which is diffused in projectiles. The force of projection delivers a blow once at the beginning and then is inactive whereas the force of gravity is always active and delivers a blow again and again which results in an acceleration of the movement. Moreover, they differ from each other for another more wonderful reason. The force impelling a projectile creates in one instant a well-determined degree of impetus in the projectile. This impetus is not indivisible but is quantifiable and has a linear magnitude.
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Borelli, G.A. (2015). The Force of the Impetus of Falling Heavy Bodies Is Smaller than Any Impulsive Force Impressed by a Projectile. In: Borelli's On the Movement of Animals - On the Force of Percussion. Studies in History and Philosophy of Science, vol 37. Springer, Cham. https://doi.org/10.1007/978-3-319-08497-8_24
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DOI: https://doi.org/10.1007/978-3-319-08497-8_24
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