ok, so you are tell me that, for each spring
V=\frac{1}{2}k (d-d_0)^2
is it true ?
i had considered this solution but the expression of potential became so complicated that i tought it was wrong.
now i retry to do it, thanks.
sorry i left out some details. Firts of all the subject is Lagrangian Mechanics, after that, the lines l and 2l is massless rods pivoted ad O and the 2 angles are the Lagrangian coordinate.
Homework Statement
Find the potential energy of this system without gravity. And after that i have to find the point of equilibrium.
http://img534.imageshack.us/img534/2667/img0121km.jpg
Homework Equations
V=\frac{1}{2} K d^2
The Attempt at a Solution
V=\frac{1}{2} K d^2 =...