Simple Experiments with Friction I had a request some time ago to talk about friction. Friction is surprisingly complicated. When two surfaces rub against each other, why is there a friction force?

Friction is a contact force when two surfaces interact. The second equation is the kinetic frictional force that is used when two surfaces are sliding against each other.

Estimates of the kinetic coefficient of friction were calculated using the maximum responses of the blocks obtained through earthquake simulator experiments and analytical relationships between the ...

A stick/slip friction experiment Say we consider a simple experiment of balancing a wooden rod on two fingers. The finger on the left, (1), will remain stationary, whereas the finger on the right, (2) ...