The document discusses the role of centrifugal force in causing tides. While centrifugal force varies with the Earth's rotation around the Earth-Moon barycenter, the actual linear speed involved is small. According to the equation for centrifugal force, the small linear speed squared becomes negligible. Therefore, centrifugal force plays a minimal role in the cause of tides. The primary cause of tides is instead the inertia effect of water being pulled by the gravity of the Moon and Sun.