Figure 1
A line graph displays adhesion characteristic curves for dry and wet conditions. The horizontal axis represents the sliding velocity (v subscript s) in meters per second, ranging from 0 to 5. The vertical axis represents the friction coefficient (mu), ranging from 0 to 0.3. The red line represents the dry condition, peaking at approximately 0.28 at a sliding velocity of around 0.3 meters per second, then gradually declining. The blue line represents the wet condition, peaking at approximately 0.16 at a sliding velocity of around 0.3 meters per second, then gradually declining. Both lines show a similar trend of initial increase followed by a decrease.Adhesion characteristic curve. Source: Authors’ own work