Recent content by gromit

  1. gromit

    Using Lagrangian to show a particle has a circular orbit

    I just went through this roughly by hand, and it seems to answer it perfectly. Thanks again!
  2. gromit

    Using Lagrangian to show a particle has a circular orbit

    That makes much more sense, thank you!
  3. gromit

    Using Lagrangian to show a particle has a circular orbit

    Hi :) This is a problem from David Tong's Classical Dynamics course, found here: http://www.damtp.cam.ac.uk/user/tong/dynamics.html. In particular it is problem 6ii in the first problem sheet. Firstly we can see the lagrangian is ##L = \frac{1}{2}m(\dot{r}^2+r^2\dot{\theta}^2+\dot{z}^2) -...