Recent content by oldspice1212

Go with it man, take the courses and get them over with. I've realized there's a lot of discouragement on this forum, so if you want to go for something; get on it, ambition is what counts, but if you want to listen to others and keep asking these questions that's up to you. Anyways good luck...

Nvm, I was wrong! Thanks anyways, we do include the constrain!

Hi there, I'm reading on the hamiltonian method and it says we can ignore constraints? Is this true, or am I missing something here, so if we have a constraint in the system we do not have to include it in the final calculation for the equation of motion? Hope someone could clear this up, thanks!

Hey, I was hoping someone could clear this up for me. When using this method, how do you get the final equation of motion, that's where I am confused. So I know I start off using Lagrangian (T - U) -> momentum (partial L/ partial q dot) -> Hamiltonian T+U, and then using the hamiltonian...

Hey CW, sorry this question was very vague I agree as I look at it now. But, you said KE doesn't have a velocity? Are you just saying that because initially the system was at rest (so KE = 0)? Because KE = 1/2mv^2.

Yes, sort of, I was thinking more so for planetary motions, so let's say: If two masses are separated by a radius...and released from rest, I would say the same thing applies right?

Hey, Say we have an object released at rest, separated by a certain distance..blah, blah, blah. When we use conservation of energy here, the kinetic energy would have a initial velocity right? So, K1+U1=K2+U2 assuming the object eventually comes to a rest...so U1 = 0, K2 = 0, so we would have...

Interesting, because recently I did a problem, for which the kinetic energy remained the same and the potential energy had changed, so that is where most of the confusion comes from.

Hey, so I have a question about motions of planets and their energy basically. When we have a circular orbit, why is it that the kinetic energy is just the opposite of potential energy? (Assuming it's a closed orbit) Like if we have U = something, than the kinetic energy T = -1/2U? This would...

Yes, that's must easier to see! Thank you so much!

I didn't upload any pics, was just making sure, and yes that makes sense, thank you :)

Homework Statement The net force on the mass is the central force F(r) = -k(r-a). Find the potential energy U(r). a is the spring of natural length and k is spring constant k. Homework Equations -dU/dx = F(x) The Attempt at a Solution F(r) = - \frac{ dU }{ dr } implies -k(r-a) = - \frac{ dU...

Thank you everyone, you have answered my question. I appreciate it!

Hey, what force classically held electron in the orbit? Also what force is it actually (quantum mechanics). I think it was the electromagnetic force classically, I haven't been able to find a legit source that says it was directly that, but when I do calculations with electrons and atoms I'm...

Hey, sorry about that, it was just a random question I found haha. I figured it out though, thanks :)