Talc is extremely useful. Talc is one of the softest minerals and is widely used as an ingredient in talcum powder. It is also used in facial makeup and ceramics.
Talc is an alteration mineral. It is formed by geological modification of some host rock. Most talc is formed from the alteration of dolomite (CaMg(CO3)2 or magnesite (MgO) in the presence of excess...
Friction is important for all sports.
Without it it becomes really hard to accelerate or deaccelerate.
For example a 100m sprinter.
It would be great for him if there wasnt any air resistance...