The moved body and its mover: modes of relative motion

Seven modes of relative motion between mover and moved

He enumerates how the moved body's motion relates to the mover's: equal on the same line, longer, shorter, directly contrary (east versus west), and transverse at right, acute, and obtuse angles, naming directions by the compass. The lines they trace can create angles infinitely variable, greater or smaller than right angles.

Simple versus compound motion, and their friction

Over two figures he notes that the frictional force at b is four times smaller than at a, then labels a b as simple motion and n m f as compound motion.

Loads carried by the ends of a cord

A lower-left figure states that the end m of the cord supports 2 pounds and the end o supports 2 others, while n pushes toward the central line by only one part. It ties the motion analysis to a concrete loaded cord.

Rows of block-and-pulley diagrams

The right leaf (folio 42r) carries several rows of pulley and gear sketches with suspended weights, arranged as a catalogue of mechanisms. They visually accompany the text's directional modes of motion.

0043 v

Nel margine destro del foglio:

Figura con lettere.

In basso a sinistra figura con lettere:

0042 r

Figura con lettere.

A lato della figura:

Due figure con lettere.

Sopra le due figure:

Gruppo di figure, di cui due con lettere.

Tre figure.

A lato delle figure:

Tre figure.

A lato delle figure:

In the right margin of the sheet:

Figure with letters.

Lower left, figure with letters:

Figure with letters.

Beside the figure:

Two figures with letters.

Above the two figures:

Group of figures, two of them with letters.

Three figures.

Beside the figures: