Friction 99%

Friction is the contact force resisting relative motion, caused by microscopic surface irregularities interlocking. It is classified into static, sliding, rolling, and fluid types, acting as a "necessary evil" that enables movement while causing wear and heat. For a comprehensive overview of definitions, types, and formulas, visit Britannica . Friction is a force - Education | vic.gov.au

La mayor parte del tiempo se es más feliz con lo convencional que con
lo inesperado, porque con la libertad no se sabe muy bien qué hacer.
Moebius
Popsy