Coulomb friction is the friction between (A) Bodies having relative motion (B) Two dry surfaces (C) Two lubricated surfaces (D) Solids and liquids

Coulomb friction is the friction between 

(A) Bodies having relative motion 

(B) Two dry surfaces 

(C) Two lubricated surfaces 

(D) Solids and liquids 

by

1 Answer

Answer :

(A) Bodies having relative motion 

by

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