6131r
[Commentary:
The page is part of Harriot’s
introduction of compound diagrams of motion, a group of folios on which Harriot eventually succeeds in deriving, by means of such diagrams, a general expression for the time of flight of a projectile (Schemmel 2008, Section 8.2). ]
Algebraic expressions are derived for the final degree of velocity of a downward motion
(or, equally, for the first degree of an upward motion)
along an inclined plane of equal length to a given vertical line,
assuming the final degree of velocity of the motion of fall along the vertical
and the inclination of the plane are given
(Schemmel 2008, 307-8). ]
The velocity of a diagonall oblique supposed
aequall to the upright.
aequall to the upright.