我国高校机械、给水排水、土建、水利等工科理论力学教材中,大多有“动量定理在流体中的应用”一节或例题,并附有相应的习题.对教材中的这部分内容,笔者提出下面几点粗浅看法,与同行讨论.1.控制体问题将理论力学中的质点系动量定理应用于求定常不 Most of mechanics textbooks in mechanical engineering, water supply and drainage, civil engineering, water conservancy and other engineering mechanics in our country have the section entitled “Application of Momentum Theorem in Fluids” or the examples, accompanied by the corresponding exercises.This part of the textbook, the author proposes Here are a few superficial views and discussions with your peers.1 The Control Body Problem Applying the Theorem of Mass Momentum in Theoretical Mechanics to Finding Frequently