Assertion: kinetic friction | /r/CreatedBy | chemical bonding
Facets:
value: between the surfaces
type: LOCATION
value: primarily
type: DEGREE
value: in many cases
type: TEMPORAL
Source sentences:
text: Kinetic friction is now understood, in many cases, to be primarily caused by chemical bonding between the surfaces, rather than interlocking asperities; however, in many other cases roughness effects are dominant, for example in rubber to road friction.