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...
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...
I'm doing some independent research and thinking mainly in psychology as such I don't have much of a physics background so I want to make sure the arguments I make that pertain to physics valid.
It's a fairly common lay person assumption that all 'change' is due to force. I orginally wanted...
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...
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...