Forza motrice ^ 



H-uds'f 





_IIC0sg^/ (a.~/)(y_y) rd.[(T-^/)(y--^)] v 



J f Hcos/ Va:--/)(,-_^ ) rd.[(x -/X^ - A)] y 



- £^' / ('^-■^(y-ff) /«J-rf^ -f){y - .9)] 



■u ds 





cosa 



_ Hcos«' / (^-~/)(z~A) ___ ^d.[(:r-./)(g-A)] ^ 



