附件242 2.3.3 Equation of momentum-conservation of momentum Fig.2-13 Sketch of oil flow through Fig.2-14 Sketch of oil fov a pipeline with a pressure vessel through a pipeline tem of above,the rate of chauge of nomentum in the system equals the net applie external force P=空 (220 The equation looks the same as the relationship Fig.2-15 Sketch of oi through curved passages F=Ma(221) Chapter2 Fundamental Hydranlic Flnid Nechanies a frictionles liquid in a ylindrical passage Fg2-14 92=4+6 (2-22) The force balance is,from equation (2-20): -pd- (2-23) cause g=dv.so (224附件 24.2 19