Acceleration in Polar Coords, Intuitive Definition video

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The discussion highlights the appreciation for educational videos on platforms like YouTube, particularly for subjects like intermediate mechanics in physics. The lecturer's ability to produce clear and neat handwriting while using a mouse or touchpad is noted, with speculation that a stylus may be involved. This reflects a broader sentiment about the value of accessible online resources for enhancing learning experiences in complex subjects.
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Summary:: I wish this video (and YouTube in general) was around when I took intermediate level mechanics as an undergraduate physics student:

I wish this video (and YouTube in general) was around when I took intermediate level mechanics as an undergraduate physics student:

 
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I'm impressed that the lecturer can print so neatly using a mouse. (Or maybe a touchpad?)
 
The lecturer is probably using a stylus.
 
Hey, I am Andreas from Germany. I am currently 35 years old and I want to relearn math and physics. This is not one of these regular questions when it comes to this matter. So... I am very realistic about it. I know that there are severe contraints when it comes to selfstudy compared to a regular school and/or university (structure, peers, teachers, learning groups, tests, access to papers and so on) . I will never get a job in this field and I will never be taken serious by "real"...
Yesterday, 9/5/2025, when I was surfing, I found an article The Schwarzschild solution contains three problems, which can be easily solved - Journal of King Saud University - Science ABUNDANCE ESTIMATION IN AN ARID ENVIRONMENT https://jksus.org/the-schwarzschild-solution-contains-three-problems-which-can-be-easily-solved/ that has the derivation of a line element as a corrected version of the Schwarzschild solution to Einstein’s field equation. This article's date received is 2022-11-15...
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