Friction at the atomic scale appears to depend on the speed at which two surfaces move past each other. This surprising behaviour was observed as the tip of an atomic force microscope (AFM) moves ...

Monolayer graphene sliding over a silicon tip. Different colors show the different values of friction force on the contact area. Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy ...

5.A body subjected to three concurrent forces is found to be in equilibrium. The resultant of any two forces 10.Identify the correct statement. (a) Static friction depends on the area of contact (b) ...

1.1 What is friction? Take this everyday example: when a coffee mug rests on a flat table, the kinetic frictional force is zero. There is no force trying to move the mug across the table, so there is ...