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🔍 PREVIEW MODE – Only you can see this. Back to Admin EduTek Lesson Notes Shop Print PDF Home › SS › Physics › Force II – Friction SS 1 Force II – Friction Physics SS 1 First Term Introduction to Friction Friction is a force that opposes the relative motion (or tendency of motion) between two surfaces in contact. It is a contact force that acts parallel to the surfaces and always opposes the direction of motion. 📌 Key Concepts: Friction: A force that opposes motion between two surfaces in contac [Preview only]