Physics 1401A/B Lecture Notes - Lecture 8: Friction
2 Jan 2019
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Friction: a force that opposes the relative motion of 2 surfaces in contact. An electrical force between molecules in different surfaces. Frictional force is parallel to the 2 surfaces. Coefficient of kinetic friction ( ): the ratio of kinetic friction to the normal force. Frictional forces occur when two surfaces are in motion (slipping) with respect to each other. The force of static friction is sufficiently strong that no relative motion (no slipping) occurs. Static: two surfaces are not moving relative to each other. The value of the can vary and the object will still remain at rest exactly cancels. Magnitude of the varies depending on the value of , Coefficient of static friction ( ): # that relates the force of static friction between two surfaces to the normal force where they meet.
