A particle is described by the lagrangian lx,y, i, j, t)= + x where o and k are constants. one of the following statements is correct: (1) p is conserved (2) to

A particle is described by the Lagrangian Lx,y, i, j, t)= + x where o and k are constants. One of the following statements is correct: (1) P is conserved (2) total energy is conserved (3) Py is conserved (4) L is conserved