LIFESCI 3J03 Lecture Notes - Lecture 6: Friction, Inclined Plane, Normal Force
21 Sep 2016
School
Department
Course
Professor
Document Summary
Life sci 3j03 - lecture 6 - friction. Joints tend to be frictionless (rotate with almost no resistance) Need friction to cause movement as well as prevent movement. Nature of friction: when any 2 bodies in contact move or tend to move with respect to each other, there is a force in the contact plane (aka friction force) Friction forces are generally necessary for movement to start and to stop. 2 main types of friction : dry friction: unlubricated surfaces, fluid friction: lubricated surfaces and viscous damping. Force p tends to push the block horizontally to the right: have to push with enough force to exceed friction. Gravitational force (mg), reaction force (n) and friction force (f) Graph shows how the friction force (f) changes as the applied force (p) increases. When p
