Recent content by runner108

Thanks Pervect, I'll look into it.

Thanks a bunch, will look more into it now that I have a clue what I'm looking for.

Oh the joys of the internet. I read everywhere that Aristotle felt that an object in motion would come to rest without any force acting on it yet no one wants to source anything. I can't find this in his writings myself though I do believe its there somewhere as it seems to be a commonly...

What does it mean to say that something moves on a straight wordline in terms of the principle of least action? I know it generally means that action is minimum or stationary but since I only really know some physics from a conceptual standpoint and not a mathematical one I don't really know...

DaleSpam: Are you a teacher? Very impressive. Thank you. You eased a troubled mind.

Indeed I am :-) If we say that acceleration is absolute meaning it will show up in all reference frames do we mean coordinate or proper?

I guess I have another question, I'm trying to understand the difference between equilibrium and movement on a geodesic. Let's say for example that a body is at rest on the surface of the earth. Let's also say the Earth is not rotating so only gravitational force is applicable. Let's also...

Just wanted to pursue one more thought here regarding proper acceleration vs coordinate acceleration. If you were falling into the Earth and the Earth was just a point mass, one would not feel a force of acceleration yet one would be speeding up based on coordinate acceleration. I can...

I just read an interesting book called "Relativity and the Nature of Spacetime" by Vesselin Petkov, I don't know if it's legitimate or not. He seemed to say that inertial force is the resistance a worldtube feels towards deviation. I don't know what if his argument is accepted or not, seems...

In the article from Wikipedia called: Geodesics as Hamiltonian Flows at: http://en.wikipedia.org/wiki/Geodesics_as_Hamiltonian_flows" It states the following: It is frequently said that geodesics are "straight lines in curved space". By using the Hamilton-Jacobi approach to the...

Awesome, thanks a lot!

So if someone is in free fall their accelerometer measures '0' therefore they are in a state of equilibrium. If they are on the face of the Earth according to Newtonian physics, gravity is pulling the person down and the ground is pushing back, therefore they are in a state of equilibrium. In...

When Statics says that the net forces equalling zero makes the state a state of equilibrium, would this be measured by an accelerometer? Meaning would an apple on the ground be considered at equilibrium despite being accelerated as far as G.R. is concerned? Or would it be at a state of...

A.T. Thanks, keen answer and drives the point home. Appreciate it.

I think I'm beginning to understand general relativity. After doing some dabbling on the history of inertial frames vs accelerated frames from the time of Aristotle I've gotten to Einstein. Finally wrapped my mind around how an object in free fall is considered to be an inertial frame as...