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# Title: [Danielis Lipstorpii Lubecensis, Specimina Philosophiae Cartesianae] Danielis Lipstorpii Lubecensis, Specimina Philosophiæ Cartesianæ (shelfmarks Leibn. Marg. 14; ZEN Leibn. Marg. 14)
# Folio 39, page id 746572255:0063
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DE RRE BY EFS MO F Y S.
Hilce Regulis Communibus probe expenlis, Facili
negoroirellisuneur lequencia Lhcoremata.
THEOREM A PR LMYM.
Si duo corpora, puta B es C, essent plane aequalia, es aque
velociter moverentur, B quidem à dextra ver (us sini-
Aram, C C illi in directum a sinistra versus dextram,
cum sibi mutuo occurrerent reflecterentur. es postea per-
cerent moveri: B versus dextram, e C versus sini-
stram, nulla parte suae celeritatis amissa.
D E M O N S F R A F +O.
GTenim cum hac duo corpora data B _C, plane aqualia,
epertecte dura, aeque relocirer morcancurperlincam
rectam, (juxtapoltul. 3.) cerrum est cain medio hujus lincx
mutuo occurlura. Acqui ex luppolicione aequalia lunt, et
aequerelocitermoventur, ergo a morendierelistendivires
iniisdebent esse aquales. Nullaenimrario cst cur agere de-
beantinscinricem, cum (per det. 2.) motus morui non sIE
contrarius, sed Tolum quies. Si relistendi vires lune aequales,
neurrum ab alterovincetur (peraxioma 10.) Guoniam vero
relistendirires lune xguales, ex ramen ex politionc rectani-
runtur in contrarium, unum verlus dexrram, alcerum verlus
siniltram; ideo relhaerebunt in puncto mutui occurus, vel
reflectentur. Sednon haerebunt; quia nihil est quod ipla si-
Stat aut impediat, (per aX. 3.) Ergorefectentur, e derermi-
nationem motusamittent (per def. 6. e ax. 10.) Aequianulla
caula est, quae iplam motus vim ee relocitarem vel sictat,
velimminuat (ex jam concestis.) Ergo aquali velocitatere:
Aectentur, anulla parre luc celcricatis amilla, urpore ob actio-
nis ee relistentix ab urraque parte aequalitarem non commu-
nicara e deperdita (pCr aX. 9.) Ouoderas demonstrandum.
LHFO.