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# Title: [Philosophiae Naturalis Principia Mathematica] Philosophiæ Naturalis Principia Mathematica (shelfmark Leibn. Marg. 166)
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VIIIII
PFTLOSOPHLAE NATORALIS
DEFINITIO III.
Materiae Vis Insita est potentia resistendi, qua corpus unumquodque.
quantum in se est, perseverat in statu suo: vel quiescendi vet
movendi uniformiter in directum.
Fhaec semper proportionalis est suo corpori, neque differt quic
quam ab Inertia mala, nisi in modo concipiendi. Per inertiam
materix, Ac ut corpus omne de Racu suo vel quielcendi vel moven-
di difficulter decurbetur. IInde etiam vis insica nomine significan-
rissimo VisInertia dici pOM. Exercet vero corpus hanc vim Colum-
modo in mutatione ctatus sui per vim aliam in se impressam Facta;
estq; exercitium ejus sub diverso respectu ec Rehctentia ec Impetus:
relistentia, quatenus corpus ad conservandum carum Cuum relucta-
cur vi impressae; impetus, quatenus corpus idem, ri resistentis ob-
staculi difficulter codendo, conatur satum ejus mutare. Vulgus.
relistentiam quielcentibus ec imperum moventibus cribuit: scdmo.
cus et quies, uei rulgo concipiuntur, respectu solo distinguuntur
ab invicem; neq. semper rere quiescunt quae rulgo tanquam quie.
Ecentia SpCCTaNEUT.
DEFINITIO IV.
Vis Impressa est actio in corpus exercita, ad mutandum ejus statum
vel quiescendi vel movendi uniformiter in directum.
Consictit haec vis in actione Cola, neque post actionem permanet
in corporc. Perleverat enim corpus in catu omni novo. per Solam
vim inerrixe. Est autem vis impressa divexlarum originum, uE ex
Actu, ex Prestione, ex vi Centripeta.
DL.LL1CLIV
Vis Centripeta est, qua corpora versus punctum alique d tanquam ad
Centrum undique trahuntur, impelluntur, vel utcunq: tendunt.
Flujus generis est Gravitas, qua corpora rendunt ad centrum ter-
rae; Vis Magnetica, qua Perrum perie magnetem; ec Vis illa
quaecunq; lucs qua elancea perpecuo retrahiuntur a mocibus rectili-
meis, ec in lineis curris rerolri cocuntur. Lapis in Funda circum-
ACtUEq
DEFLNF.
TIONE50