The physics of Slippery When Wet (IMAGE) North Carolina State University Caption Researchers have now described a new law of physics that accounts for elastohydrodynamic lubrication (EHL) friction, which should advance a wide range of robotic technologies. EHL friction occurs when two solid surfaces come into contact with a thin layer of fluid between them. Credit Lilian Hsiao Usage Restrictions Image credit must be given. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.