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Modified Atwood Machine 5kg/7kg-Video

November 11, 2014 · by physics · Modified Atwood Machine

Raw Transcript

Hello, everyone. This is Tom from everystepphysics.com and everystepcalculus.com. I’m going to do a Modified Atwood Machine problem. And that’s where the mass instead of hanging in both size and the pulley with a rope, its one mass is on a table. Interesting note, notice that the angle is 90 degrees in the corner. So as important as we in another video use friction and and angle. And also friction on the modified atwood machine but let me show you how we do this problem with my programs. Physics to get into my menu. Press enter. We’re going to scroll down to Atwood Machine. Find the acceleration. These arrows here show that there’s more on the menu in case it comes in the middle like this. And we’re gonna choose not atwood machine but modified atwood machine there. Number 3. You have to press Alpha before you put anything into these entry lines here. and the m1, mass 1 of the problem is Alpha five kilograms. If it wasn’t, I would convert it for you and show you that so you could mark it on your paper. And the second mass, m2 is alpha 7 kilograms, again. Choose number two. I show you what you entered in case you made a mistake. I say it’s okay. Here’s a picture just like in case you needed to the draw the picture yourself, you could use that. Here’s the formula. Really simple, isn’t it? Yeah but try to remember that formula from the way professors describe it on the blackboard and how they use the diagrams etc. And so the answer is 5.722 and they have 5.8 meters per second squared on me problem. I always liked put 5 decimal points, not 5 decimal points but 5 integers so that you can, some tests require that. And you can use 3 or 2, whatever you want. But notice they got the free body diagrams going and try to decipher that and put that into a test or homework. It takes me a long time to to do it myself when when I finally get the formula is here. And especially with angles and with friction force. And also I always do tension. That’s a big deal because it uses the acceleration that you’ve just found to find the tension. So here’s the tension 28.613 Newton’s. Pretty neat, huh? everystepphysics.com. Go to my site, buy my programs pass your physics class and subscribe to me so you can see other videos that I might make. Thank you.