the force between rubbing surfaces is called(1)____.friction(2)____down the movement of objects. the(3)____surface produce more friction while(4)____surface produce (5)____friction. (6)____is friction that acts on objects that are not moving or (7)____. it's a kind of friction that(8)____an object from moving against the surface. kinetic friction is the(9)____to motion caused by the contact between(10)____and the object(11)____against it. the force of kinetic friction acts to (12)____of the object,so if you push something forward,friction pushes it backwards. the kinetic fiction force only applies to an object that is moving (hence“kinetic”)and is otherwise known as(13)____
