- #1
RRraskolnikov
- 12
- 0
In the attached snip, the last few steps of the lagrangian equation is shown. I don't understand how the [itex]\frac{\delta V}{\delta\dot{q_j}}= 0[/itex]. As an example let me take gravitational force. With change in velocity ( along the downwards direction obviously), there sure is a change in gravitational potential energy. When [itex]q_j[/itex] changes then [itex]\dot{q_j} [/itex]definitely changes. So what am I missing here?