Principle of Least Action
http://edu-observatory.org/olli/Action/index.html

   KINETIC ENERGY (T)
  
   
 
 

   POTENTIAL ENERGY (V)
  
 
 

   LAGRANGIAN MECHANICS (L = T - V)
  
 


   ACTION PRINCIPLES
  



   ACTION PRINCIPLES
  
  
 

   THIS SINGLE PRINCIPLE THAT UNDERPINS ALL OF PHYSICS
  
   https://www.youtube.com/watch?v=Q10_srZ-pbs
   Credit: Derek Muller's Varitasium







  

  
 
 
  
  
  
  
  





 
    sam.wormley@icloud.com