1. The problem statement, all variables and given/known data Show that if the potential in the Lagrangian contains-velocity dependent terms, the canonical momentum corresponding to the coordinate of rotation θ, is no longer the mechanical angular momentum but is given by: p = L - Ʃn[itex]\bullet[/itex]ri x ∇viU 2. Relevant equations 3. The attempt at a solution Setting: L = T - V(qi,qi') Lagranges equation must be satisfied***: d/dt(∂L/∂qi') - ∂L/∂qi = 0 => d/dt(∂T/∂qi' - ∂V/∂qi') - ∂V/∂qi = 0 Am I on the right track? I know I am supposed to use ∂ri/∂qi = nxr somewhere. ** Why is it that it MUST be satisfied?