sliding friction
Usually static.
kinetic friction
Static...as you write layers of graphite are sheared off and left on the page. The layer that touches the paper "sticks" and doesn't slide.
kinetic friction
there are 2 types: 1)static friction and 2)kinetic friction
Sliding Kinetic Friction is usually greater than Rolling Kinetic Friction. Sliding Kinetic Friction is caused by two objects being dragged together, providing more opportunity for the objects' microscopic hills and valleys to catch.
Usually static.
kinetic friction
Heat.
Static...as you write layers of graphite are sheared off and left on the page. The layer that touches the paper "sticks" and doesn't slide.
kinetic friction
there are 2 types: 1)static friction and 2)kinetic friction
Kinetic
Kinetic or centrifugal, depening what phase you are on.
kinetic
Grip is a type of friction that people need in order to walk comfortably. Without grip, people would slide and have nasty falls.
There are five laws of friction. These include "within large limits, kinetic friction is independent of velocity" and "friction depends on the type of surface where contact is made."