Recent content by usljoo

well look man i really am no beginner here and the question is far from trivial so don't ask me these questions about the string because you didnt get my question i think better tell me what the forces of constraints are

the forces on the string are the tension force witch acts on the pivot where you binded the string and the same acts also on your hand but i don't see what this has anything to do witch my question im asking you under these constraints that i have drawn and when you apply a tangential force F...

i hope ur mac does pdf :P

ok look at the attachment

when a particle is constraint to move on a circle, what are the constraint forces

yes but when you work harder you then get more pleasure out of it and i know math very well because i AM a mathematician and i don't see where the fun is in it, but physics really goes beyond your imagination and opens whole new views of the world and not views of some imagined set of objects...

well i guess youre doing some thinking too, but its not nearly as hard and pleasing as physics

i see, ok then ill take it that an ideal conductor is supposed to have infinite charge because it is the only thing that makes sense with the statement that no electric charge distribution (stationary) can ever produce an e field inside everything else was not good. and zapper z gave me maybe...

lock thank for ur help of course it is puzzling to solve it with charged conductors when you don't know the charge distribution but that aside. so an ideal conductor is supposed to be able to cancel out all ext e fields ok thank you very much and in your work with these resistive materials...

the e field inside the conductor is the unknown ok? and that i need and that i assumed to be zero and not and that's didnt answer my question at all but ok your claim that an ideal conductor is supposed to have infinite free charge is what bothers me

look man its not 13.6*10^5 Coulombs its 13.6*10^5 electrons so a big mistake no wounder you get such a large energy needed to move this. 13.6*10^5 should be multiplied by the charge of electron and then the calculation continued and then you would find that the energy needed to move the...

oooh come on youre just laughing at me you don't need to solve poisons equation for any boundary conditions because you don't even get that far, youre stuck one step behind that, you don't have the el potential not even the e field. and I am not saying that gausses law isny valid hehe you...

ok so by field emision you mean that charge follows the field in vacuum. and how am i supposed to solve maxwells equations if i don't know the charge nor the e field inside the conductor. i rather have to assume that the e field is zero inside to conclude that no charge is inside. but let...

thanks this is the best answer so far i guess, ill lock at it more closely

ok, when you say field emision you mean like breakdown into air right and that there would be charge lost and how would in an ideal situation a conductor have infinite amount of charge, as i figure the free charge would only be continuous and i don't see a reason to make that idealization you...