Thanks Orodruin. Is there a physical interpretation to the partial derivative of the surface normal with respect to time? Or in other words, it seems from applying the chain rule for ##\displaystyle\frac{d{\mathbf{n}}}{dt}## that
\begin{equation}
\frac{\partial {\mathbf{n}}}{\partial...
This stems from considering rigid body transformations, but is a general question about total derivatives. Something is probably missing in my understanding here. I had posted this to math.stackexchange, but did not receive any answers and someone suggested this forum might be more suitable.
A...