Marci of Kronland, Johannes Marcus - De proportione motus, seu regula sphygmica ad celeritatem et tarditatem pulsuum

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1ſtentià in b & f, quam ut loco moueantur ex illo impul
ſu, minor autem in c: motus quidem ex b & f in a refle
ctit, ex c verò expulſo illo mobili quieſcit, ſi ſit æquale:
eundem verò motum continuat in d, ſi minus ſit percuſ
ſum: quia tamen reſiſtentia impulſum minuit, quó ma
jor reſiſtentia, eò minor velocitas motus.

Propoſitio XXXVII.

Motus in ſe ipſum reflectit, cùm centrum grauitatis & conta
ctus ſunt in eádem lineá motus.

GLobus a occurrat plano in b, ſitque centrum grauita
tis aut impulſus e in lineà motus ab perpendiculari
ad contactum b, dico hunc motum in ſe ipſum reflecti.
Quia enim motus & huius plaga ad motum fit ſui cen
tri, erit motus globi a, & hujus plaga in lineâ ab à centro
e ductà per contactum: & quia eadem ratione impul
ſum recipit & impellit, eſtque major reſiſtentia in b quam
impulſus ex e, erit motus reflexus in eadem lineà ab.
Motus ergo in ſe ipſum reflectit, cúm centrum grauita
tis & contactus ſunt in eadem lineà motus. Obijcies
cùm pila percutit planum, eàdem vi percutitur ab illo
plano: eſt autem à percuſsione æquali impulſus æqua
lis, quó enim violentiùs incidit, eó magis impetuosé reſi
rit ab illá plagà: impulſus ergo, quem pila recipit â

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