Feynman's lost lecture now live

Love the video! I now know two ways to prove the ellipse. u/retrokirby from reddit here

Nice!

Ah, yes, this was a little tricky. I wasn't sure how to handle this with the video being published on a different channel, since in this case there may have been ambiguity as to whether the Patrons credited on screen were supporting 3b1b or minutephysics. Playing it conservative, in case for some reason anyone wouldn't want their name appearing as a supporter of minutephysics, I decided not to put them on here. Feel free to DM or email me if this is of enough significance that you'd like to hold off the charge on this particular video. Don't worry, you will for sure be shown on screen at the end of the next video.

3blue1brown

Really enjoyed this one. Got lost putting it all together in the last 2 minutes of the video but each step is elementary and I can see the beauty in putting it together. I think I must just be lacking infinite intelligence.

Thanks so much Cameron, I'm glad you enjoyed!

3blue1brown

Hey Grant! Great Feynman video. That guy is my hero (check out Surely You’re Joking Mr. Feynman if you haven’t read it). Unrelated to the video but I just want to say your series on the essence of linear algebra is incredible. College linear algebra just made no sense to me without some kind of visual intuition into how everything worked. The eigenvalue video is the bee’s knees. Also the manim library is really neat and fun to tinker around with. Keep up the good content man!

hello can you sopport me please ♥

I'm glad it happened to be so relevant.

3blue1brown

This is so timely for me, as I've been playing with the maths of ellipses and gravitational orbits in MATLAB for a couple of months (just for fun :). The circular velocity vector space was an eye-opener, and the constant delta V vectors answered a question that had been bugging me for weeks! Beautfiful work Grant, thank you again.

Chris Jennings

Good math lecture!

trizinc

Incredible!

It might be worth talking about other uses of hodographs. There turn out to be a bunch of physics problems where looking at the hodograph leads to useful insights or simplifies computations. For example: what is the hodograph of a simple parabolic trajectory of a projectile in uniform gravity?

Jacob Rus

This is very nice, but for myself, it would probably take me a whole afternoon to actually understand it;

Charles Weaver