No, I'm just talking about the frictional force resulting from two surfaces interacting with each other. We often think of friction as a bad thing that we want to reduce—but there are also many ...

Then there is probably some sort of lecture like this: Friction is a contact force when two surfaces interact. The second equation is the kinetic frictional force that is used when two surfaces ...

One is simply that two surfaces get squashed closer together. But a curious thing about friction is that the frictional force opposing sliding doesn’t depend on the area of the contacting surfaces.

The main reason for this is that frictional forces slow down the motion of surfaces in contact: think of the moving parts in a car engine. Over five hundred years ago, Leonardo da Vinci was the ...

and the measurement of small frictional forces, but in essentials it remains the same as described by the above authors. The modifications enabled a single fibre mounted in a bow to be carried ...