Lecture 14 - 440:221 Intro to Engineering Mechanics Statics Alberto Cuitino Po Ting Lin Instructors Arturo Villegas Assistants Fall 2011 Based on

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440:221 Intro to Engineering Mechanics: Statics 1 Fall 2011 Based on Textbook Material: Engineering Mechanics Statics, 12 th Edition, R.C. Hibbeler, Pearson 2010. Alberto Cuitino, Po Ting Lin Instructors Arturo Villegas Assistants
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440:221 Lectures School of Engineering, Fall 2011 Equilibrium of a RIGID BODY 2 A
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440:221 Lectures School of Engineering, Fall 2011 Topics to be covered • What are the equations of equilibrium in 2D for a rigid body? • What is a two- and three-force member? • How do we solve equilibrium problems? 3
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440:221 Lectures School of Engineering, Fall 2011 1. The beam and the cable (with a frictionless pulley at D) support an 80 kg load at C. In a FBD of only the beam, there are how many unknowns? A) 2 forces and 1 couple moment B) 3 forces and 1 couple moment C) 3 forces D) 4 forces C) 3 forces C) 3 forces Conceptual Question 1
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440:221 Lectures School of Engineering, Fall 2011 2. If the directions of the force and the couple moments are both reversed, what will happen to the beam? A) The beam will lift from A. B) The beam will lift at B. C) The beam will be restrained. D) The beam will break. A) Lift from A A) Lift from A Conceptual Question 2
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440:221 Lectures School of Engineering, Fall 2011 Draw a FBD of the crane boom, which is supported by a pin at A and cable BC. The load of 1250 lb is suspended at B and the boom weighs 650 lb. Let’s work on this problem
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440:221 Lectures School of Engineering, Fall 2011 Let’s work on this problem
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440:221 Lectures School of Engineering, Fall 2011 FBD Solution
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440:221 Lectures School of Engineering, Fall 2011 Draw a FBD of member ABC, which is supported by a smooth collar at A, roller at B, and link CD.
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This note was uploaded on 09/25/2011 for the course ENGINEERIN 221 taught by Professor Cuitino during the Spring '10 term at Rutgers.

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Lecture 14 - 440:221 Intro to Engineering Mechanics Statics Alberto Cuitino Po Ting Lin Instructors Arturo Villegas Assistants Fall 2011 Based on

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