Physics

Salam !

 Sir  friction has no unit  , but I'm confused  about fluid friction  may it carries  a unit or not , bcz according to equation drag force is equal to 6pnrv . So 6p are constant terms then remaining part is nrv . So what is the unit of fluid friction.. Kindly explain it sir .

friction is force and it has unit (Newton), but coefficient of friction has no unit..