POE - Lesson 2.1 Videos
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Activity 2.1.1 Finding the mass of irregular objects
How is a map of North Carolina Balancing on a nail? In the video we look at a way of using gravity to find the center of mass of an object. Take notes on the method, as we will be doing the same technique with both regular and irregular shapes |
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Activity 2.1.1 - Calculating Centroids
In this video a simple rectangular composite cross section is presented with a quick guide on calculating the centroid location. Try to solve it on your own (the formulas are in the PLTW Formula Sheet) |
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Activity 2.1.1 (Day 2) Finding Centriod
Watch the Video all of the way through Open MDSolids on your computer and find the centroid of the shapes that you calculated yesterday. Did your answers match? Why or Why not? |
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Activity 2.1.2 Beam Deflection
Watch the video all of the way through and then: - Open MDSolids - Complete the same beam deflection in the video How much force did he apply in the example? |
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Activity 2.1.2 - Measuring weight with 2x4s
POE students give a quick explanation of how they made their measurements in Activity 2.1.2, just a little more dramatically than what we will do in the workshop. Take notes on the general measurements |
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Activity 2.1.2 - Beam Deflection Measurements Application
While this is not going into as much depth, this is a real life application of the concepts of beam deflection |
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Lesson 2.1.3 Free Body Diagram
Today we will begin studying Free Body Diagrams. This will be VERY important going forward! Practice drawing the diagrams that are represented as you go! Write down any questions that you have so that we make sure that get answered during the lesson. |
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Lesson 2.1.3 Statics
Today will will begin studying Statics and how they relate to internal and external forces on objects. This video Newtons 3 laws of motion, these will be very important in helping us calculate internal and external forces on objects. Write each of the laws in your notebook in your own words. |
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Lesson 2.1.4 Net Force & Vectors
Today will will begin studying Force Vectors As you watch the video, pause as he asks questions and answer them in your notebook as you go. |
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2.1.4 Finding Magnitude and Direction of Vectors
Take a few minutes and review finding how you can find magnitude and direction for a given Vector. While the notation is a little different than what we will use in the class, think about the following questions:
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Lesson 2.1.5 Calculating Moments
Today will will begin studying Moments This video provides an example using the free body diagram with Force to find the Moment. Draw along with the video in your engineering notebook. |
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2.1.5 Moments and the Right Hand Rule
In looking at vector forces, we noted that moments could be associated with vectors. Today this video provides us with a handy tool for determining what direction our rotational forces are going. |
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2.1.0 The truth of Engineering
A reminder that there is a wide range of what engineers do. It takes time, experience, and determination to find the engineering you love. MajorPrep's youtube channel has some great videos on the general concepts of what an engineer in, with bits and pieces of his personal experience with engineer, from college graduate to real world employment. |
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2.1.6 Static Determinency
A short video on the definition and importance of static determency. We'll be talking about how to mathmatically test this idea to determine if a problem can be solved |
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Lesson 2.1.6 Truss Calculations
In this video, write down the steps followed to solve this truss calculation. You will see that to solve this complex problem, we are breaking it down into the simpler tools that we have learned about in this unit, including reviewing moment calculations, free body diagrams, and some basic trigonometry tools. |
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Lesson 2.1.6 - Trusses in MDSolids
In this video, you can see how the truss problem for Lesson 2.1.6 is built in MDSolids. While you still need to do the math and work your way though the problem in Activity 2.1.6. this does provide you with a way to check your numbers on existing problems, or to create new problems to build your skills |
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Statics Review - Internal Forces
In this video you look at breaking apart a truss diagram to determine the types of forces being applied to the joints and members of a truss, how that information is used to create free body diagrams, and then with given information, how to start calculating the forces applied. |
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Review: Beam Deflection
This video goes a little more in depth on variations of beam deflection, the first part of the beam deflection problem is in metric units. While we largely stay with the US customary measurements, the formula stays the same |