![]() ![]() It would not allow any motion in the x or the y or the z directions. This pipe would be firmly attached to, to the ground, okay? And so, it doesn't allow, in fact, let me call up my coordinate system here. Now, the, the, the big thing that you should have, worked on, is the force and moment reactions at the fixed support here down at the bottom. Because they were insignificant as compared to the applied forces and moments. I went ahead and made the assumption that I neglected the, the weights of the pipe. We have that 20 pound, foot pound couple. In this case our body of interest is the portion of the pipe that we're studying. Okay, here's the good freebody diagram of the system. And after you've got that complete I want you to come back and see how well you did. And so, go ahead and draw that free body diagram for this system. Okay, what you should first do is, is, is always draw a free body diagram. Take a minute, think about it, write it down. What do we do first? And you should know by now what you'd do first. And so, my question to you is that's the physical model of this real world system. And there's an applied moment of 20 foot-pounds, applied right here and that's due to a wrench, a wrench kind of turning that thing. And a five pound force here that are both parallel to the, the y-axis, this being the y-axis. ![]() And we need to determine the force and moment reactions that this fixed support at the bottom for the physical model of the of, of this piping system or a portion of the piping system. And so I've physically modeled a portion of that piping system here, here on the, the left. In fact, this is a piping system that I've, I've taken a picture of in one of our undergraduate teaching labs here at Georgia Tech. So this is the problem we're going to look at to solve a 3D equilibrium example. Now, in 3D, we're going to have six independent equations. And I also show the scalar form down there, because in 2D, as we've solved problems in the last few modules, we get three independent equations. We had to have a balance of forces and a balance of moments about any point we choose. And so if you go back to earlier modules, these were the static equilibrium equations in vector form. And then we're going to apply those equilibrium equations to solve for the force reactions and moment reactions acting on a body. First we're going to recall the 3D static equilibrium equations. We're getting close to the end of the course so I thought I'd, wear a nice bright red tie to celebrate the conclusion of the course. ![]() > Hi and welcome to module 28 of An Introduction to Engineering Mechanics. Wayne Whiteman directly for information regarding the procedure to obtain a non-exclusive license. ![]() Any other use of the content and materials, including use by other academic universities or entities, is prohibited without express written permission of the Georgia Tech Research Corporation. By participating in the course or using the content or materials, whether in whole or in part, you agree that you may download and use any content and/or material in this course for your own personal, non-commercial use only in a manner consistent with a student of any academic course. The copyright of all content and materials in this course are owned by either the Georgia Tech Research Corporation or Dr. The course addresses the modeling and analysis of static equilibrium problems with an emphasis on real world engineering applications and problem solving. Concepts will be applied in this course from previous courses you have taken in basic math and physics. This course is an introduction to learning and applying the principles required to solve engineering mechanics problems. ![]()
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