ME 242 Lecture 23 03.30

ME 242 Lecture 23 03.30 - ME 242 Dynamics March 30, 2009...

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1 ME 242 Dynamics March 30, 2009 Eric Wang Sequel to Midterm #1 • Friday next week • Will cover everything up to & including last Friday’s lecture • Chapters 3, 4, & 5 (skip 5.3 & 5.4) • Closed book, closed notes • Cheat sheet (1 page, 1 side) • Starts at noon (not 12:05) Today’s Key Concepts Chapter 6: Kinematics Rigid Bodies 2D general motion Translation + Rotation Relative motion on a rigid body The Real Fun Begins! • On a rigid body , all the points maintain the same distance relative to each other • A rigid body cannot deform in any way Types of rigid body motion • Pure Translation • All points undergo same translation Types of rigid body motion • Pure Rotation • Rotation about a fixed point
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2 Types of rigid body Motion • General motion • Combination of pure translation + pure rotation General Motion • Can decompose any general motion into a pure translation + a pure rotation OR Applications • Mechanisms Constrained Motion • Points on a rigid body cannot
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ME 242 Lecture 23 03.30 - ME 242 Dynamics March 30, 2009...

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