理论力学 第→掌净力学亦念 和物称的受方分折
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Chapter 1: Fundamental principles of statics and force analysis D81-1 Fundamental concepts in statics D81-2 Principles of statics 心§1-3 Constraints and their reaction forces □§1-4 Force analysis and force diagrams
7 §1–1 Fundamental concepts in statics §1–2 Principles of statics §1–3 Constraints and their reaction forces §1–4 Force analysis and force diagrams Chapter 1: Fundamental principles of statics and force analysis
第一章静力学公理与物体的受力分析 §1-1静力学的基本概念 四§1-2静力学公理 回§1-3约束与约束反力 §1-4物体的受力分析与受力图
8 §1–1 静力学的基本概念 §1–2 静力学公理 §1–3 约束与约束反力 §1–4 物体的受力分析与受力图 第一章 静力学公理与物体的受力分析
Statics Chapter 1: Fundamental principles of statics and force analysis 8 1-1 Fundamental concepts in statics 1. Force 1)Concept: the mechanical interaction of bodies is caused by forces. This interaction can change the state of motion of a body. 2)Effects of forces: Omotion(external effect) @deformation(internal effect) 3)The three elements: F magnitude. direction and point of application. 4)Unit of force: newton(N(International System of Units) kilonewton (KN)
9 Chapter 1: Fundamental principles of statics and force analysis §1-1 Fundamental concepts in statics 1. Force 1) Concept: the mechanical interaction of bodies is caused by forces. This interaction can change the state of motion of a body. 2) Effects of forces: ①motion (external effect) ②deformation (internal effect). 3) The three elements: magnitude, direction and point of application. F A 4) Unit of force: newton (N) (International System of Units) kilonewton (kN)
学 第一章静力学基本公理和物体的受力分析 §1-1静力学基本概念 、力的概念 1.定义:力是物体间的相互机械作用,这种作用可以改变物 体的运动状态。 2.力的效应:①运动效应(外效应)②变形效应(内效应)。 3.力的三要素:大小,方向,作用点 F 力的单位:国际单位制:牛顿(N) 千牛顿(kN 10
10 力的单位： 国际单位制：牛顿(N) 千牛顿(kN) 第一章 静力学基本公理和物体的受力分析 §1-1 静力学基本概念 一、力的概念 1．定义：力是物体间的相互机械作用，这种作用可以改变物 体的运动状态。 2. 力的效应：①运动效应(外效应) ②变形效应(内效应)。 3. 力的三要素：大小，方向，作用点 F A