Recent content by Ebarval

Nevermind! Looks like I missed a simple mistake in my original formula for s[t]. I did not have a [t] on the z[t] for the theta term. I believe it works now. Although the wikipedia page is still too convoluted to help anyone

Hi all, I can't find a single thing online that translates a cartesian velocity vector directly to spherical vector coordinate system. If I am given a cartesian point in space with a cartesian vector velocity and I want to convert it straight to spherical coordinates without the extra steps of...

How about for the attached section? They mention the surface terms go to zero which I assume are the uk*ul

Ah I see! Thank you! But now I have more questions. How can I tell from integral if something will end up as a surface term and that it goes to zero if there is no such delta term explicitly multiplying?

But then why can't that be done on the step after eqn 1.6 or 1.6 itself?

Hi all, I'm trying to understand when surface terms go to zero. I'm not really getting a connection other than many textbooks just saying surface terms go to zero. I have added a photo of Liboff's Kinetic Theory page 3 on Lagrange's equations. Before equation 1.7, he says the surface terms go...