Some friction will occur with seemingly smooth surfaces because at a molecular level, nothing is smooth.
Rolling coefficients of friction between hard wheels and solid smoth surfaces of the kind that you describe, are usually very small and below 0.02 . The friction force is this number multiplied by the weight carried by the skate-board so it would not exceed 4 lb. However to answer the question fully, hardly anybody finds this friction, most people are not interested in it.
smoth jazz
Smoth Muscle.
yes.
intestine, and stomach
Smoth
SANDY
animal cells
There are two syllables. Smoth-er.
smoth and rinkerly
Actually they don't they have short smoth fur.
No it nurishes it and leaves it beautifuly smoth and soft.