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TomLikesPhysics
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r(t)=(2t, wt, 4t) in cylindric coordinates. How do I find v(t)?
 2 years ago
 2 years ago
TomLikesPhysics Group Title
r(t)=(2t, wt, 4t) in cylindric coordinates. How do I find v(t)?
 2 years ago
 2 years ago

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TuringTest Group TitleBest ResponseYou've already chosen the best response.1
w is omega?
 2 years ago

TomLikesPhysics Group TitleBest ResponseYou've already chosen the best response.1
Yes
 2 years ago

TuringTest Group TitleBest ResponseYou've already chosen the best response.1
I can't see how it is anything other than just differentiating wrt t
 2 years ago

TomLikesPhysics Group TitleBest ResponseYou've already chosen the best response.1
I think the problem is that the unit vectors in cylindric coordinates also vary with time so it is not just v(t)=(2,w,4)
 2 years ago

TuringTest Group TitleBest ResponseYou've already chosen the best response.1
so the directions here are\[\hat r,\hat\theta,\hat z\]I suppose, eh?
 2 years ago

TomLikesPhysics Group TitleBest ResponseYou've already chosen the best response.1
right
 2 years ago

TuringTest Group TitleBest ResponseYou've already chosen the best response.1
do you know the answer?
 2 years ago

TomLikesPhysics Group TitleBest ResponseYou've already chosen the best response.1
No, however I just computed v(t)=(2, 2t*w, 4) but I don´t know if is correct or not.
 2 years ago

TomLikesPhysics Group TitleBest ResponseYou've already chosen the best response.1
I also have no clue how I could ask wolfram alpha to check that.
 2 years ago

TomLikesPhysics Group TitleBest ResponseYou've already chosen the best response.1
I used this formula but I am not entirely sure if this formula fits that problem.
 2 years ago

TuringTest Group TitleBest ResponseYou've already chosen the best response.1
I have never seen that formula, so I can't verify it...
 2 years ago

TomLikesPhysics Group TitleBest ResponseYou've already chosen the best response.1
I thought this is a "simple" problem.^^
 2 years ago

TuringTest Group TitleBest ResponseYou've already chosen the best response.1
http://www.maths.ox.ac.uk/system/files/coursematerial/2012/1115/77/CylCoords.pdf that formula you have seems to be right, though I can't seem to see where they get the extra rho from
 2 years ago

TomLikesPhysics Group TitleBest ResponseYou've already chosen the best response.1
The extra rho comes from the derevative of the unit vector e in the direction of phi.
 2 years ago

TuringTest Group TitleBest ResponseYou've already chosen the best response.1
ahh, okay, I had to read that sheet a but closer to get it thanks!
 2 years ago

TomLikesPhysics Group TitleBest ResponseYou've already chosen the best response.1
No problem, you´re welcome.
 2 years ago
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