L1-Statics_Intro

# L1-Statics_Intro - Engineering Mechanics - Statics Dr....

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1 Engineering Mechanics - Statics Dr. Holland Roadmap • Forces (F) and Moments (M) – Concentrated forces and moments – Vector algebra • Equilibrium – Sum of forces and moments equal zero – Free body diagrams (tool) – Equilibrium equations (solve for unknown forces)

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2 Roadmap (con) • Simple Analysis – Supports – Structural members • Types of Forces – Distributed – Fluids (static) – Friction Engineering Mechanics Study of the effects of forces on a body • Statics – bodies at rest or moving with a constant velocity • Dynamics – bodies that are accelerating • Statics - combines physics and vector algebra
3 Physics – Newton’s Laws Weight Ground Professor 1. For a body at rest, or moving with a constant velocity, the sum of the forces are equal to zero. Equilibrium Equilibrium Equations Σ F = 0 allows us to solve for unknown F’s Consider the Egg Physics – Newton’s Laws 2. Σ F = ma Note, when acceleration equal zero (a body is at rest or moving with a constant velocity) we get Newton’s first law. Σ F = 0

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4 Physics – Newton’s Laws 3. The action and reaction between bodies are • Equal in magnitude • Opposite in direction • Collinear (act along same line) Weight 300 lbs Ground 300 lbs line of action Free Body Diagrams - tool for developing equilibrium equations engineering student at Davis Vectors x y θ P Characteristics of a vector 1. Magnitude: P = P = length, force 2. Direction: P ( θ from x-axis) x y P x = 4 in
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## This note was uploaded on 01/19/2010 for the course ENG 35 taught by Professor Holland during the Spring '08 term at UC Davis.

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L1-Statics_Intro - Engineering Mechanics - Statics Dr....

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