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. . Mr. McMartin. Beta Pod Science. While playing ball, your friend throws the ball out of your reach. Rather than running for the ball, you walk after it. You know that the ball will stop. But do you know why?. 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, . finishing Chapter 6:. Friction, Drag. . Rolling . without slipping. . Examples . of Newton’s Second Law. Microscopic bumps and holes crash into each other, causing a . 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. A force that opposes motion between two surfaces that are in contact.. Causes a moving object, such as a ball, to slow down and stop.. Occurs because the surface of any object is rough (microscopic hills and valleys). 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.. In-Class Activities. :. Check Homework, if any. Reading Quiz. Applications. . Characteristics of Dry Friction. . Problems Involving Dry Friction. Concept Quiz. Group Problem Solving. Attention Quiz. 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…... 1. Today’s Concept:. Friction. UP. Midterm . 1. Mechanics Lecture 6, Slide . 2. Average=102.1”%”. . Excellent Job!. You can do the problems!. Unit 5 Homework. Mechanics Lecture 6, Slide . 3. The amount of friction depends on...... Surface Roughness. Forces pushing the two surfaces together.. Types of Friction. https://app.discoveryeducation.com/player/view/assetGuid/72E28A59-0EAB-4EC9-A097-365513460023.