Timo Stienstra

#99 should also be fixed first.

> For example, if we apply the fundamental principle of dynamics (Newton's 2nd laws of motion) to an electrically charged particle of mass `m` in an electrostatic field, we can...

> * `Vector` and `Dyadic` form the basis of the module on which everything depends. `ReferenceFrame` is next, followed by `Point`. `functions` should be a gathering place of overarching functions....

I just noticed that `printing.py` actually also has a several local imports. Multiple from `functions.py` because it requires `dynamicsymbols._t`.

@Abhishekjsr283204 I am unfamiliar with the exact implementation of `limits` and `Piecewise`. To tackle this issue I would suggest actively debugging `limit(p, x, 2, '+')` to see where it goes...

@eh111eh don't forget to add yourself to the mailmap.

Here is my brief summary of how Kane's method is implemented in SymPy including handling of constraints (I think I may have sent it already some time in the past...

I left out the computation of the generalized forces, but those are the same in SymPy's implementation. The one considering 1...c are of course not really there in SymPy. Those...

> I take it from your equation A9 matching my equation (19) that your eq (A9) is used in sympy.mechanics.) > Please let me know. Yes, mostly it is just...

> What do you mean by 1....c ? The equations involving the nonlinear motion constraints, e.g. 20, 26, ...