If anyone cares to comment I would appreciate it. While considering a method to study the motion of a curling stone in an alternate frame of reference I noticed that if the rotational speed of a curling stone where it touches the ice is less than its translational speed (system A), it is possible to reproduce the _relative contact_ velocities between the stone and the ice by having an ice surface rotate underneath a stationary stone (system B).
the two systems are illustrated here: http://web.ncf.ca/eo200/twosystems.jpg The green vector is the _relative contact_ velocity of one point of contact. Does this analysis appear correct? Harry
