Recent content by jaykay99

Can i also perhaps use the Precession? Is that right?

Thx for you answer but this is not that i want to know I simply want to know how can i calculate the resistance of a medium(rho=100 ohm meter) between to 2 points which are about 1 km away.

noone who can help me?

Wow that sounds quite difficult. It is a personal interst. Of cousre Z depends on r, g, and v. I know that but g and v are constant. It would be very nice if you explain it to me with the Lagrangian. I know a bit of the Lagrangian and hope i can follow you when u pls explain it to me, this...

can anyone help me with this task? What function Z(r) must a funnel(radius R) have if a coin(radius=r and mass=m) could rotate in that with an only horizontal velocity and the coin always stays on the same altitude(z-coordinate)? R>>r

Thx for answers I am sure that it are 100Ohmm ! What law could i use instead of Gauses law? Help pls

Thank you for your answer! I found sth. in the internet: http://www.spiralwishingwells.com/guide/physics.html The form of a funnel is -1/x^2. But it doesn't help me. I don't know the lagrangian but i know the other moments... but i don't have any approach / idea how to start with my...

help me pls :confused: Has it to do with the torque? I need an approach. Can i say the velocity of the masspoints on the coin is not the same and therefore the centrifugal force also is not the same at the masspoints? help me pls

Can no one help me?

I have the solution as an attachment. it is a pdf. But how to calculate with a coin?

That is clear how to calculate with a point mass. The solution is R(z)=R_0*e^sth. But i want to know how to calculate with a coin. The rotation also has an effect but i don't know what. For every speed(only horizontal) you have an z-coordinate on which the coin stays.

Homework Statement I want to calculate the function R(z) (R=radius, z=altitude) of a funnel in which a coin( if it has no friction and only gets a horizontal speed v) always stays on the same z-coordinate. the radius of the coin is r and r<<R. What function has the funnel and how would a sphere...

Thank you for your answer. I found a nice vid on youtube: https://www.youtube.com/watch?v=http://www.youtube.com/watch?v=rfyng8f-bOA&feature=related What form must the funnel have? Is it really to complicated to calculate with the gyrscope behaviour?

is it too difficult? Should i put in advanced physics?

If there is no friction, it could work. Because the speed is not constant the F_z also is not constant. So it would be more difficult. Or other question: [SIZE="3"]What is the difference between a pointmass and a coin rolling like this? When a point rolls like this it is quite easy to...