PPT-Static and kinetic friction

Relationship with normal force magnitude Problem solving involving frictional forces Lecture 7 Friction Frictional forces Frictional force opposes motion or impending motion relative to a surface. ME 225 ; PRINCIPLES OF TRIBOLOGY. PRESENTATION ON. SIDDAPPAJI .B. FRICTION. A force that resists the relative motion or tendency to such motion of two bodies in contact. . Friction always works in the direction opposite from the direction the object is moving, or trying to move. . Friction. Friction is a force that opposes the motion, or tendency of motion, of an object.. Friction is caused . mostly by . the . electromagnetic . interactions of particles within molecules at the surfaces of objects in contact. While these interactions can be rather complex, their combined effects can be reasonably approximated with a decent amount of consistency.. Friction. Friction is a force that opposes the motion, or tendency of motion, of an object.. Friction is primarily caused by the chemical bonding of molecules at the surfaces of objects in contact (intermolecular forces which are electrical in nature). - Class . 11. Today:. . Friction, Drag. Rolling . without slipping. Examples . of Newton’s Second Law. Microscopic bumps and holes crash into each other, causing a frictional force.. Pre-class Reading Quiz. (Chapter. Is F = . μ. N. What is Friction?. Resistive . force caused by two surfaces rubbing against each other. R. esists . an object's motion . - acts . opposite direction of motion . or "intended . motion. Friction. Unit 2 . Lesson 1. Friction. Friction is a part of everyday life, without it the world would be a very different place. Walking would not be possible, either would driving a car or playing sports. Even sitting on a stool would be difficult.. Applications involving Friction. What is Friction?. Friction is a FORCE that opposes or impedes the motion of an object.. Friction is caused by microscopic bumps between solid objects in contact.. Friction can exist from sliding objects or rolling objects (though rolling friction is less than sliding).. http://www.aplusphysics.com/courses/honors/dynamics/friction.html. Unit #3 Dynamics . Objectives and Learning Targets. Define friction and distinguish between static and kinetic friction.. Determine the coefficient of friction for two surfaces.. A 40 N chair is pushed across a room with an acceleration of 2 m/s. 2. . Steven pushes with a force of 15N. What is the force of friction acting on the chair?. Static and Kinetic Friction. Static – not moving. What factors affect (the size of) friction?. Survey says:. Surface texture. Surface material. Surface area. Speed of slide. Mass. Weight. Angle of surface. Normal Force. What is the mathematical relationship between…... What factors affect (the size of) friction?. Survey says:. Surface texture. Surface material. Surface area. Speed of slide. Mass. Weight. Angle of surface. Normal Force. What is the mathematical relationship between…... Friction k a is usually greater than the coefficient of static friction s b usually equals s c is usually smaller than s d equals the applied force that exceeds the maximum static force c 2 The purpos finishing Chapter 6:. Friction, Drag. . Rolling . without slipping. . Examples . of Newton’s Second Law. Microscopic bumps and holes crash into each other, causing a . frictional. force.. Chris Hadfield recently spent nearly five months in orbit around the Earth. He was living on the International Space Station, which orbits at 370 km above the surface of the Earth (low earth orbit).. 1. STATICS. (ENGINEERING MECHANICS-I). بسم الله الرحمن الرحيم. Friction. Friction is a force that resists the movement of two contacting surfaces that slide relative to one another..