Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ π -¹ ² ³ °

You are not logged in.

- Topics: Active | Unanswered

**renjer****Member**- Registered: 2006-04-29
- Posts: 50

Unit Tangent is easy to get. But when I get to unit normal, it kinda seems too difficult sometimes, particularly when you're trying to find T'.

Or when I try to use the tangential and normal accelerations (a=aT'+v^2KN) formula, that can get very hard too. (where a is the acceleration, T is the unit tangent vector, v is the velocity, K is the curvature and N is the unit normal).

So does anyone know a simpler way of doing this?

Offline

**Ricky****Moderator**- Registered: 2005-12-04
- Posts: 3,791

Can you define "principal unit normal"? I can't seem to find a definition on mathworld or any other place.

"In the real world, this would be a problem. But in mathematics, we can just define a place where this problem doesn't exist. So we'll go ahead and do that now..."

Offline

**renjer****Member**- Registered: 2006-04-29
- Posts: 50

I think this is the place where I found it.

Offline