Where ? - Not on the floor when you're trying to walk. Or in your brake pads.
You seek to reduce it only where it converts otherwise useful (or desired) work into heat.
Decrease friction .
by using a lubricant to decrease the friction.
Friction is decreased by means of lubrication.
Decrease friction.
You can describes the friction
Friction will decrease if the coefficient of friction decreases. This can be caused by having a smother surface up to a point. (When two surface are TOO smooth the friction actually increases due to molecular attraction.)
Wax, due to it filling the pores that cause friction will reduce friction.
you don't.
you don't.
Yes.
"lubrication"
because you dont no