PPT-Lecture 8: Wind & effects of friction

Inertial Oscillations A fluid parcel is initially at x o y o and pushed with a velocity u o u x t 0 u o v o It is then allowed to move freely on a rotating earth. 3 FRICTION The property by virtue of which a resist ing force is created between two rough bodies that resists the sliding of one body over the other is known as friction The force that always opposes the motion of o b Draw a FBD including friction c Solve problems involving friction brPage 2br READING QUIZ 1 A friction force always acts to the contact surface A normal B at 45 C parallel D at the angle of static friction 2 If a block is stationary then the fric Wedges . & Screws. ENGR B36 - Statics. Pat Aderhold. 11/24/2014. News & Notes. News & Notes. Today’s Agenda. More friction.... Wedges. Screws. Practice Problems on white board. Review / project time. 2. Objectives. . Students must be able to. Utilize theory of dry friction. Describe . theory of dry friction. . Describe . physical meanings. of frictional effects. Describe and differentiate between . EQ: What changes an object’s motion?. Friction and Gravity. What happens when you jump on a sled on the side of a snow-covered hill?. What happens at the bottom of the hill?. Friction and Gravity. Why does the sled’s motion change on the side of the hill and then again at the bottom?. 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.. 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. Friction. Friction is the resistance force when 2 rigid solids slide (or attempt to slide) across one another. FYI: Drag is a resistive force when solid fluid flows through a liquid or a gas and has different characteristics. Grade Science. What is it?. The force that slows motion between two surfaces that are in contact with each other.. Real life examples. . A baseball player diving into home plate.. Tires on a car can roll freely. 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. What do you Remember about Friction?. Friction opposes motion. Friction is dependent on the texture of the surfaces. Friction is dependent on normal force. motion. friction. What do you Remember about Friction?. REVIEW OF KEY FORCES. Pressure gradient force (PGF). High to Low. Perpendicular to the isobars. Proportional to isobar spacing. Coriolis. force (COR). Acts to . right. of parcel direction in N. Hemisphere.