what trick are u pulling out of the hat this year???

**grrrr** · 11-09-2004, 05:52 PM

Originally Posted by The AD

How about this so we don't offend the mathematically inclined here: A corked spin is a spin where the axis of rotation is in the yz plane, but not the z axis, in a righthand rule cartesian coordinate system where the x direction is defined in the skier's horizontal direction of travel and the z direction is defined as the direction of gravity.

I will accept that answer for a "C+". Now, for an "A", please define the relation of the axis of rotation to the arc of the trajectory of the object.

**Buster Highmen** · 11-09-2004, 06:04 PM

Originally Posted by grrrr

I will accept that answer for a "C+". Now, for an "A", please define the relation of the axis of rotation to the arc of the trajectory of the object.

Modulo perturbations due to drag, your lipstick notwithstanding, they are independent.

Note: "corked" => axis of rotation is not vertical.

**The AD** · 11-09-2004, 06:07 PM

Originally Posted by grrrr

I will accept that answer for a "C+". Now, for an "A", please define the relation of the axis of rotation to the arc of the trajectory of the object.

Let me amend my earlier definition to say the x direction shall be tangent to the skier's trajectory. Z is normal to the trajectory in the plane of the trajectory. The axis of rotation is a vector defined in a plane that is normal to the trajectory.

**grrrr** · 11-09-2004, 06:42 PM

Very nice. Your reward shall be the opportunity to smack a Bush butt second in line after me.

**Steven S. Dallas** · 11-09-2004, 10:11 PM

I was not aware that math would be involved.

**Jiehkevarri** · 11-10-2004, 03:14 AM

You guys are soooo old...

**gincognito** · 11-10-2004, 07:22 AM

Originally Posted by Bullet

There's that other trick Gincognito did in his video. It's like a back-scratcher, but sort of twisted. Someone told me it was a mule kick or something like that. I see the guys in the park trying it all the time. They must be having trouble though, 'cause they keep grabbing at the tail of their ski.

I rule. Though I can't take credit for crankin' the mule kick - that was a buddy of mine. I did, however, come across some footage of some wicked daffies (no doubles - we were never that cool).

SaAaH (and finding gold in old vhs tapes),
d.

**bad_roo** · 11-11-2004, 01:02 PM

The greatest trick the devil ever played was the one where he threw a pack of cards at the window of a truck and the one you picked was stuck to the inside of the glass by Sharon Osborne's fanny batter.