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Kinesiology
Chapter 4 Arthrokinematic Motion
4
Other
Undergraduate 3
10/02/2010
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Term
Rotation about a moving axis so that all of the points on the spinning object contact unique points on the stationary surface.
 Definition

Roll

 

Example: rolling motion causes ea. pt on a tire surface to contact a unique location on the road.
Term
Pure translation of the articulating surfaces without any rotation, a single point on the gliding object contacting several pts on the stationary surface.
 Definition

Glide

 

Example: when a tire skids, a single pt on the tire glides over several points on the road.
Term

Convex on Concave Law:

 

Opposite direction

 

 

 

 Definition
Convex jt surface moves on a fixed concave surface in the opposite direction as the moving body sement
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