I'm a bit confused regarding the directions of velocities and acceleration in curvilinear motion. Assume a curvilinear motion, which is not circular. I know that tangential component of velocity and acceleration are tangential to the curve at any point on the curve. But what about normal acceleration and normal velocity?
- Are they same as radial acceleration and radial velocity?
- Are they in the same direction of the position vector r?
- Or are they parallel to radius of curvature of the curve?