(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A particle of mass "m" and electric charge "q" moves without friction along an ellipse in the horizontal plane, in the presence of a constant electric field of intensity E directed along the large semiaxis of the ellipse.

Write the Lagrange function

2. Relevant equations

We now, obviously the ellipse equation so we choose as general coordinates:

X1 = a*cos(phi) X2 = b*sin(phi)

3. The attempt at a solution

L = T - U;

T = m/2*(X1'squared + X2' squared)

But U?

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# Homework Help: I need the form of potential energy for a simple problem

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