- #1
pergradus
- 138
- 1
I'm doing a Lagrangian problem in spherical coordinates, and I was unsure how to express the kinetic energy, so I looked it up and wiki states it should be this:
http://en.wikipedia.org/wiki/Lagrangian#In_the_spherical_coordinate_system
Which would give me the correct answer, but I'm unsure how one would derive that expression. Can someone explain it? You don't necessarily have to do all the work out, just an explanation of the steps would help greatly.
Thanks.
http://en.wikipedia.org/wiki/Lagrangian#In_the_spherical_coordinate_system
Which would give me the correct answer, but I'm unsure how one would derive that expression. Can someone explain it? You don't necessarily have to do all the work out, just an explanation of the steps would help greatly.
Thanks.