The 3 laws of friction are
1. The force of friction is directly proportional to the applied load. (Amontons' 1st Law)
2. The force of friction is independent of the apparent area of contact. (Amontons' 2nd Law)
3. Kinetic friction is independent of the sliding velocity. (Coulomb's Law)
Guillaume Amontons
Charles-Augustin de Coulomb