# Driven here by some good books and a puzzling video

• clickcrumbs
In summary, the individual in question was driven to their current location by a collection of thought-provoking books and a perplexing video. They specialize in providing condensed summaries of information and do not engage in responding to questions.
clickcrumbs
How did you find PF?
I'm trying to get a numerical understanding of the changes in rotation in this video: https://youtu.be/QFeG9CeeH88, and stumbled on this thread: https://www.physicsforums.com/threads/angular-momentum-in-a-collision.782181/
Hello all, I'm glad to join this forum as someone who is coming back to an interest in physics in mid-life.
A year or two ago, I started reading the Theoretical Minimum series of books by Leonard Susskind and a few other authors. I'm nearly 40 now but got a minor in applied math when I was in college, so I find these books more interesting than wordier books about physics. I've been so interested, in fact, that I've started taking the intro physics for scientists and engineers sequence. I finished Mechanics last Fall, and am excited to start E&M this Tuesday.

For the final paper in Mechanics, I wrote about a scholarly paper which derived a simple expression for the change in one particle's kinetic energy after colliding elastically with a particle at rest; the author of this paper then used this expression to estimate the number of collisions needed to thermalize a neutron in a fission reactor (https://aapt.scitation.org/doi/10.1119/10.0001629). Working on this really helped me see the broad applicability of mechanics and "simple" concepts like the conservation of momentum. Now I'm interested in the application of the conservation of angular momentum to the rotation problem in the video I linked above.
More generally, I can't wait to learn more about how all of this works within the electromagnetic field, of which I know little except half-remembered vector calculus from 2008.

Thanks for welcoming me and I can't wait to discuss topics like these and find other ones that drive you to do work on your own.

click crumbs

berkeman and PeroK

clickcrumbs
clickcrumbs said:
More generally, I can't wait to learn more about how all of this works within the electromagnetic field, of which I know little except half-remembered vector calculus from 2008.
Welcome to PF and enjoy the ride! EM is a wonderful application of vector calculus, with Maxwell's Equations being a central set of concepts.

When you end up with schoolwork-type questions (even for self study), please post those in the Homework Help forums and show your best efforts to work on the problems. When you have general technical questions about concepts, post those in the technical forums with links to the reading you've been doing so far on them. You will get great help here.

gmax137 and clickcrumbs

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