Alright, fellows. I'm in a deep one. I need to find the turning points (points where [math] \dot{r} = 0 [/math] ) of pic related.
The result should be given by the equation in pic, but the one I'm getting has minus at the second term in the second parenthesis.
Can anybody tell me where am I wrong?
Anthony Howard
Also, to use the initial conditions (r0, v0) to express the constants arising from the integrals of motion.
Appreciate your help
Jayden Myers
>has minus I meant to say that it has plus in the second term of the second parenthesis.
Jaxon Reed
bampo
Anthony Rivera
>Doesn't post the complete problem. >Doesn't post the whole solution attempt. >Can anybody tell me where am I wrong?
Do you think people on Veeky Forums are clairvoyant?
Luis Harris
>tfw this problem was in my classical mechanics test
Show us your work OP, I don't feel like doing everything from the start
Nolan Phillips
Well, just speaking for myself, I don't know what r is or what is happening in the picture.
Andrew Perry
If you can't figure out what's going on just from the pic then I don't need your help.
I don't feel like TeXing all that shit. Basically, I've got the correct Lagrangian in polar coordinates, I'll use the initial conditions to find express the integrals of motion.
Energy of the system came out as
[math] E = \frac{1}{2}mv_{0}^{2}r_{0}\dot{\varphi} [/math]
When used, this energy gives the correct result for the equation of the turning points, but I'm getting the plus sign in the second term.
Whic
Alexander Campbell
Slash that quadratic initial speed. Should be just [math] v_{0} [/math]
Asher Fisher
Lol > if you don't remember what every first year physics problem is about from picture alone you can't possibly help Hope you find someone who meets your standards.
Ethan Foster
>first year problem Get lost
Samuel Rodriguez
PS. Pretty sure the only ones to meet those standards by the way are probably people who are also currently doing the problem, or maybe did it last assignment.
I figured you'd be happy for some bumps so you could find your unicorn.
Cameron Garcia
Don't need one. Alredy finished it. It's pretty pathetic that most of Veeky Forums is incapable of even discussing the problem.
Jose Clark
That's because you basically said, I have this letter "a" and it's supposed to be part of a word, anyone know which one?
Anthony Moore
You're a brainlet and you don't know shit about classical mechanics if I even have to tell you what those letters in the picture mean.
Kevin Morris
FUCKING LOL. I can't believe you are this stupid and are calling other people brainlets. It was an analogy, I wasn't saying that you didn't say what the letters meant, I was saying that you didn't give any of the information to solve the problem. Holy fuck, I can't believe you just said that.
Jace Butler
triggered as fuck lol
get back to klass, kiddo
Kevin Ross
No, it was hilarious, it was a revelation to how stupid you actually were. I guess the brainlet thing is just a defense mechanism. It also explains why you would post a problem with barely any information.
Tyler Nguyen
Both of u are brainlets, I'm the real Veeky Forumsentist here. Ask me anything.
Brody Williams
I'm missing something here. What is the difference between r and r0? r0 is the origin of r as in (r=0m)?
Sebastian Ward
Also, are you sure Mgr^2 isn't Mgr^1?
Samuel Campbell
Yes, it looks like you distributed the r-r0 factor but then kept it as a separate factor as well.