# Show that the electric field E in the system at rest is $E=\frac{Q}{4 \pi \epsilon_0 \sqrt{(x^2+y^2+z^2)^3}} (x,y,z)$ [closed]

A body point charge $Q$ moves in relation to the reference system $\Sigma$ according to the law of motion $x(t)=v_0 t$, $y(t)=0$, $z(t)=0$.

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Hello Patty24 and welcome to this site. Please reconsider en.wikipedia.org/wiki/Electrostatics#The_electric_field and some of the following paragraphs, e.g. concerning the electrostatic potential. Greets –  Robert Filter Jul 1 '11 at 16:53
No one is so kind to help me? .. Perhaps I was not very clear in explaining the problem. –  Patty24 Jul 1 '11 at 16:55
..perhaps. Also, are you sure this shouldn't have had a special-relativity tag instead of GR? –  qftme Jul 1 '11 at 17:05
thanks!good idea :) –  Patty24 Jul 1 '11 at 17:12
Hi Patty! We have some rules about how homework questions need to be posed on this site: most importantly, you need to show us your work and ask about the specific issue that is giving you trouble. Don't just ask us to do your work for you. See this meta question for details. If you edit your post to make it a better homework question, I'll be happy to reopen it. –  David Z Jul 1 '11 at 17:35