'518 DE PRESSIONE PONDERIS 



Qiiccirca trcs formul.^e piincipales qiias inucnlmus 

 lequenti inodo cxprimentur : 

 L Prcflio =:;a>-E)(/+F}+;p>-EY/'(2f+E)+F(2E+^)) 



+ ;V(^-E}(f/-+/F4-F') 



II. Momentum refpeclu ABzr ;«(<•— EX^4-/F+F') 



4-,',p(f-E)(2^r+2EF>(^4E)(/+F)*) 

 + T'.y(^-E)(/*+JF+/F'+F') 



III. Moracnt. rcfprdu axis AC — ;a(^-E)(/(2^+E)-i-F(aE4-^)) 



+ V.p(^-E)(2/?^4-:^FE'+(/+FX^+E)^) 

 +,',Y(^~E)(2<?/4 2EF=+(^+E)(/+F)'-). 



Problema 'j. 



Fif. 10. Si bafis qna poadus plano incumb:t , fucrit ' 



triangulum A B D ct media direflio preflionis tota- 

 lis G cadat in pundum O, inucnire preflionem in 



fingulis baleos pundlis. 



S o 1 u t i o. 



29. In bafin A B demiflb perpendiculo D G 

 Toccntur AG^a ctBG — 6 ctDG — f, tnm 

 \ero fit AP=:p ct P O :z ^ et quia bafis conflat 

 partibus A G D et G O B , ad vtramque Lemma 

 praccedens accomm.odemus , ac primo pro fpatio 

 A D G , habebimus E=:o, Fizro, e —a^ /— ^ > 

 hincque trcs formulae noflrac erunt 



I. Preffio —\a.ac-\-ig,ac^-'^yacc 



II. Moment. rcfpecT:. k^ — \a.acc-\-'t^aacc\--,,yac^ 



III. Moment. refpect. XQ — kcLaac^-^^a^cYlyaW 



Pro 



