Friction is a fundamental force that affects motion and plays a vital role in everyday life, mechanical systems, and workplace safety. This course introduces the four main types of friction—static, sliding, rolling, and fluid—and explores how each influences movement between surfaces. It emphasizes the factors that affect frictional force, such as surface texture, contact area, and applied pressure, and highlights practical applications in industrial, transportation, and environmental settings. By examining real-world scenarios, the course equips participants to recognize how friction impacts efficiency, control, and safety.