Antispin - A smooth rubber with very low surface friction, used to defend against strong spin or to confuse the opponent.
(An example would be using plastics that have low surface friction.)
Limbless organisms moving on land must often contend with surface friction, but do not usually need to expend significant energy to counteract gravity.
Melody fathomed her analogy: ice was cold, solidified water that had a greatly reduced surface friction.
The spinning effect, along with surface friction, usually will produce a forward momentum.
And as the ball spins, it drags air around it by surface friction.
These heights were chosen to diminish the effects of surface friction and to represent winds in the lower boundary layer.
Rough - cards which have been treated with substance to increase surface friction, making it easier to keep cards aligned to each other.
The hip balls were made of a softer vinyl that allowed movement while retaining the surface friction required to maintain a pose.
Materials science, surface friction, distance and areas familiar to a mechanical engineer.