,-44€ ) 209 ( |'^<- 



defignentnr vt fit AD-a*, DE-y et angulus AED-Cj), 

 erit pro pundlo A, fin. 4)z:o, ideoque fier (5^) — ^C-^^ 



hoc eft in pundo A vis tangentialis penitus , euanefcic , 

 qnia lannina muro firmiter infixa fupponitur. In gencrc 

 autem habebitur vis tangentialis :: ,,.. 



= A-^(|-f)^=rA-CG(i+Dfin.(J))=:-ADfin.(p>, 



ob CGr A, vis flutem norraalis momentum erit ADcof.<j5, 

 Fiet autcm hinc 



dv — ds cof. Cb — ^ ^ '^"^- ^ 



vnde integrando colligitur 



^^v^.Di«,$)_^,onft., 



•vbi conftans ita definiatur vt j euanefcat pofito (j5=ro, 

 erit igitur in geiiere 



„ V2 [i -4- D An. CP) — V 2 



-^ — D V C ' 



hincque concluditur fin. (p — j' V C (^ D j V C - V 2), ex 

 quo demum elici poterit aequatio inter x et y per for- 

 muiam d x — dy . tang. Cp). 



§. 13. Quia vis tangentialis in A euanefcit, erit 

 pro pundo A, G= (^f )^ rr ■ AG, tum vero quoque liquet 

 efle momentum ponderis P pro puncflo A 



= P. N M =r G (^^) =: y ±2 . 



S\ nunc pro altera extremitate laminae M angulus EMN 

 indigitetur per (J), primum erit vis tangentialis 



=:- AD. fin, Cp=:Pfin.(p, 

 ideoque P=: — AD, tum vero quoque 



NM V^ f' -t- D An. O) — Vi ., 



" — D~7c — ^-J ideoque 



AaaALad.lmp,Sc,Tom,V.?,lL Dd VAG 



