Видео

Thank you for the compliment, but I had to remove them because my University asked (suggested/told) me to. I created an online graduate class in mechanisms as part of the online MS program and they don't want me giving away the majority of the content for free. I've not been asked to remove any other content.

You're welcome. This was made during the Covid shutdown, and I started adding a different guitar at the end of each video, for a little while, because I was going loopy.

sorry for the stupid quuestion now i get it, the friction is nonconservative force, so it is included and counted as external force

I recorded the video for my students who miss class due to illness. I didn't expect anyone else to watch it.

@@ProfessorTedDiehl Just wrote an exam today, i'm pretty sure i got a distinction for it thanks to you. You're teaching style and humor are exceptional

@@jeffreymakape505 I am very glad to hear that! Also glad I could help someone. I don't even cover this topic in my course any longer.

Generally speaking, there is usually a way (depending on the setup of the problem) to reduce the problem to a "2 equations and 2 uknowns" scenario, so be on the lookout for that. There's some chance, but not often, you'll have three equations (x, y, and z) and three uknown (usually components of an unknown force). This usually requires a 3x3 matrix, but I don't think that occurs this early in the semester, but maybe at some schools. I often recommend students do an example problem that has a solution already but cover up the solution and treat it like a problem you don't know the answer. Force yourself to go through it until you get an answer. Then try the homework again. You'll often find it much easier. I cannot answer further questions, as I'm working on a new course this semester. I'm not sure why I answered this one. I guess I just felt like it. Best of luck!

Sorry. I don’t post course material as they contains images I didn’t create and have no right to share. I share the videos I’ve made for my classes as a courtesy to my current and former students for their future reference. I’m hopeful they also benefit others on their engineering journey as well, but strongly encourage all to purchase Shigley’s Mechanical Design and Philpot’s Mechanics of Materials on which I’ve based my lessons.

@@ProfessorTedDiehl no worries, the videos are more than enough. thank you for posting them!

Try it both ways and check the difference. Liquids are often treated as incompressible even though they can be compressed a very small amount. Their density is more dependent on temperature than it is on pressure, so using the saturated fluid specific volume at the known temperature is a decent approximation. Check the specific volume in the compressed liquid water tables at different pressures for the same temperature, the differences are typically less than one percent.

The 11th edition of Shigley’s Mechanical Design from McGraw Hill.

thank u so much!!!

Glad you like them!

Thanks for your feedback. I made a mistake.

Thanks

You just did! Please don't ask me to share slides or notes. The majority of their content is based on Professor Robert Norton's book "Design of Machinery" which I urge everyone to purchase and I have no right to give it away for free.

If the angle is greater than 90 and less than 270 degrees, the cosine of it becomes negative so it adds to 1 instead of subtracts.

Brent, thanks. Where in the video did I make the mistake?

Thank you! Being useful is what I strive for. I’m not certain how I could improve Wormy…. You can see an Apple with Wormy, right? Maybe something’s broken?

@@ProfessorTedDiehl I don’t know what you mean by wormy. But Thanks so much for the videos. It really helped my class. Surely getting an A in the Machine Design paper ! And Prof, all I was saying is that, use different thumbnails for different videos, so we know what each video is about

Nice guitar skills tho ❤️