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Frictional Definition & Meaning - Merriam-Webster
Friction | Definition, Types, & Formula | Britannica
FRICTIONAL | English meaning - Cambridge Dictionary
What is friction? (article) | Khan Academy
FRICTIONAL | definition in the Cambridge English Dictionary
Friction - Wikipedia
Friction review (article) | Friction | Khan Academy
6.2 Friction - University Physics Volume 1 | OpenStax
FRICTIONAL Definition & Meaning | Dictionary.com
5.1: Friction - Physics LibreTexts