# ch01a - Engineering Mechanics Statics Chapter 1 General...

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Engineering Mechanics: Statics Chapter 1: General Principles

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Chapter Outline Mechanics Fundamental Concepts Units of Measurement The International System of Units Numerical Calculations General Procedure for Analysis
1.1 Mechanics Mechanics can be divided into 3 branches: - Rigid-body Mechanics - Deformable-body Mechanics - Fluid Mechanics Rigid-body Mechanics deals with - Statics - Dynamics

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1.1 Mechanics Statics – Equilibrium of bodies At rest Move with constant velocity Dynamics – Accelerated motion of bodies
1.2 Fundamentals Concepts Basic Quantities Length – Locate position and describe size of physical system – Define distance and geometric properties of a body Mass – Comparison of action of one body against another – Measure of resistance of matter to a change in velocity

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1.2 Fundamentals Concepts Basic Quantities Time – Conceive as succession of events Force – “push” or “pull” exerted by one body on another – Occur due to direct contact between bodies Eg: Person pushing against the wall – Occur through a distance without direct contact Eg: Gravitational, electrical and magnetic forces
1.2 Fundamentals Concepts Idealizations Particles – Consider mass but neglect size Eg: Size of Earth insignificant compared to its size of orbit Rigid Body – Combination of large number of particles – Neglect material properties Eg: Deformations in structures, machines and mechanism

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1.2 Fundamentals Concepts
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