Althalos

196 reputation

bio	website
	location	Sweden
	age
visits	member for	2 years, 5 months
	seen	May 22 at 8:15
stats	profile views	26

	196 reputation	bio	website		visits	member for	2 years, 5 months
17 badges		location	Sweden		seen	May 22 at 8:15

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May 22	accepted	Difference between velocity vectors, relative speed
May 21	comment	Difference between velocity vectors, relative speed @DavidZaslavsky Sorry, I didn't understand the question. Velocities of objects, for example airplanes, with respect to an inertial frame.
May 21	comment	Difference between velocity vectors, relative speed @DavidZaslavsky $V_B$ and $V_A$ are velocities. Imagine for example two airplanes. One flying in a loop, how would that pilot perceive his relative velocity to the pilot in the other airplane? (This is the question which I worked on when I got stuck with this conceptual problem)
May 21	asked	Difference between velocity vectors, relative speed
May 19	comment	Problem with a rotating frame of reference on the South pole Wait, I got this. Thank you for your help.
May 19	comment	Problem with a rotating frame of reference on the South pole Isn't the center of the coordinate system the earth's center? So R is the distance from the earth's center to the train at the earth's surface?
May 19	comment	Problem with a rotating frame of reference on the South pole That works, thank you very much. Do you know why the centrifugal acceleration didn't matter here? It seems to me that the acceleration normal to the surface would be $g+R\Omega^2$?
May 19	accepted	Problem with a rotating frame of reference on the South pole
May 18	comment	Problem with a rotating frame of reference on the South pole What frame of reference do you use? Is $\Omega$ the rotation of the earth? How can I calculate that the line deviates 0.13 degrees?
May 18	asked	Problem with a rotating frame of reference on the South pole
May 15	comment	A slender rod with a ball at the end @OSE You're right. Thank you for bearing with me for the time it took for me to wrap my head around this!
May 15	awarded	Commentator
May 15	comment	A slender rod with a ball at the end @OSE The way I see it, that's because the horizontal force will create angular momentum unless the broom is infinitely thin. My problem in a nutshell is that I don't see how a horizontal force through the pin, about which the rod is supposed to rotate, can cause angular momentum? It's like making a hole through the mass center of the broom, put your finger there and then run, in that case I don't think the broom would rotate either.
May 14	revised	A slender rod with a ball at the end added 183 characters in body
May 14	revised	A slender rod with a ball at the end added 154 characters in body
May 14	revised	A slender rod with a ball at the end added 4 characters in body
May 14	comment	A slender rod with a ball at the end How do I include internal stress in a free body diagram?
May 14	revised	A slender rod with a ball at the end deleted 1 characters in body
May 14	asked	A slender rod with a ball at the end
May 11	accepted	Constant of gravity in earth fixed coordinate system