
#1
Oct509, 07:10 AM

P: 106

1. The problem statement, all variables and given/known data
There is a joint system of rods and masses.We need to set up Lagrangian. 2. Relevant equations L= TV , T = Kinetic energy , V = Potential energy 3. The attempt at a solution Hey what should we take as the zero of potential. So does the Lagrangian depend on the zero of potential? 



#2
Oct509, 08:29 PM

HW Helper
P: 5,004

You can take any point you like as the zero potential point...Your Lagrangian will of course depend on which point you choose, but since the equations of motion only involve derivatives of the Lagrangian ,and not the Lagrangian itself, the physics will be independent of your choice.



Register to reply 
Related Discussions  
Does the Einstein Hilbert Lagrangian has a potential term?..  Quantum Physics  4  
Electric Potential Difference Question (Parallel plates, higher potential)  Introductory Physics Homework  1  
derive lagrangian: finding potential energy of a particle constrained to a surface  Advanced Physics Homework  4  
Lagrangian... anyone know their Lagrangian mechanics?  Advanced Physics Homework  7  
Electric potential, potential difference, and potential energy  Introductory Physics Homework  2 