- #1

atreide

- 3

- 0

**T**(t) =

**r**'(t) / ||

**r**'(t) || always has length 1. Alright, so how do we get a sense of the length of the actual tangent vector itself? Its direction is easy to imagine, but I can't understand how its magnitude changes along the curve (does it have something to do with curvature?).