/sci/ - Science & Math

This shit seems easy af, but my solution seems off. Basically these rods constrain the masses and for them to have the same lenght and be riggid, the motion should be such that these rhombus shape is mantained. But if that is the case, my system just has 1 degree of freedom and everything is expressible by the angle one rod makes with any axis, but doing this I got to a Lagrangian that was [math]L=mL^2\dot{\theta}^2-kL^2[/math], i.e. the potencial energy is constant. So I don't know If I'm assuming something else, because that would mean that it's stationary.