Figure 4
From: A surface topography analysis of the curling stone curl mechanism
Surface topography images of a pebble in the ice sheet, corresponding to four slides with different translational (upwards) and rotational speeds (counterclockwise). (a) Fast sliding (~1 m/s) and fast rotation (~4.5 rad/s). (b) Fast sliding and slow rotation (~1.3 rad/s). (c) Slow sliding (~0.5 m/s) and fast rotation. (d) Slow sliding and slow rotation. The topography before the slide is shown on the left, while the corresponding topography after the slide is shown on the right. Vector plots represent the velocity vectors of each point of the contact annulus; these correspond well to the observed orientation of the two sets of parallel scratches.
