Physicists in the US have made a peculiar discovery about how a small object slides over a rapidly rotating lubricated disk. They have found that if the object is tilted so that it only touches the ...

Friction is an intrinsic physical phenomenon to curling. Without it, objects in motion would move endlessly, without slowing down. This would cause many safety-related problems: Cars or trains could ...

IT is universally assumed that the force resisting the sliding of one body over another acts in a direction opposite to the relative velocity. However, no recent test of this law appears to have been ...