Proportion Between a Thrown Stone's Motion and Its Mover
The stone's quantity of movement follows the swiftness of the moving cause; base line labelled a b
A proposition on the mechanics of a moved stone: the quantity of movement imparted to the stone bears the same proportion to the movement of its mover as the moving cause is swifter at one time than at another. A ruled horizontal line at the top of the page is labelled a and b, the base to which the note refers. The reasoning ties the resulting motion directly to the speed of the impelling cause.
On this page
Motion of the moved stone follows its mover's speed
The quantity of movement of the stone that is moved will hold the same proportion to the movement of the moving thing as the time of that moving cause is swifter at one time than at another. Faster impulse yields proportionally greater motion. The ruled base line above is marked a b.
A proportional relation of movement to time
The note is framed as a strict proportion: as the mover's time is more swift one instance versus another, so the stone's movement is greater in that same ratio. It reads the relation between cause and effect quantitatively.