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Chapter 5.2 Friction at the Sochi Winter Olympics
Friction friction is the force that opposes motion.
Causes of friction Surfaces have tiny hills and valleys on both sides. As the surfaces slide across each other the hills and valleys grind against each other.
Causes of friction Friction depends on both surfaces. http://news.discovery.com/adventure/videos/science-friction-all-about-the-physics-of-curling-video.htm
Types of Friction Static friction - friction force that resists motion between surfaces that are not moving.
Types of Friction Sliding friction - the friction force that resists the motion of an object moving across a surface.
Types of Friction rolling friction - opposes motion of a rolling object.
Types of Friction air friction - a force of the surrounding fluid (air) working against motion
Types of Friction
Motion through water - viscous friction works much like air friction.
Effect of weight on friction Adding weight to a sliding or rolling object adds friction between the two surfaces. Which takes more force to push?
Decreasing Friction 1. Lubrication - such as oil 2. ballbearings 3. Magnetic Levitation
Increasing Friction 1. cleats
Increasing Friction 2. Race tires vs Street Tires - Street Tires increased friction in wet conditions. - Race tires increased friction on dry roads.
Sci. 1-3 Friction: A Force that Opposes Motion Pages
How does friction affect motion?
Chapter 2, Section 3 Friction. Friction Definition: a force that opposes motion between two surfaces that touch. Example: Tires on a street.
What is Friction? How does it work?
PLEASE TAKE OUT YOUR HOMEWORK. Friction - a force that opposes motion, or “pushes back” when two surfaces are touching. It’s always around and it affects.
Two main causes Friction Friction Two solid objects sliding against each other. Two solid objects sliding against each other. Drag Drag The backwards.
Monday October 14, 2013 Agenda: I can identify key terms about forces and motion. Daily Science: What is the basic SI unit for length? Learning target.
Balanced and Unbalanced Forces
Section 13-2 Friction Friction Force that opposes the motion of an object Created when surfaces rub together.
"The most beautiful thing we can experience is the mysterious... It is the source of all true art and all science." - Einstein.
Ch 10.3 Forces Force: action on an object to change state of rest or motion (accelerate) (push or pull on object … “baby”answer) Objects change motion.
Chapter 12 What You Will Learn Friction Magnitude (size)
Chapter 5 Matter In Motion
C. Friction Friction force that opposes motion between 2 surfaces depends on the: types of surfaces force between the surfaces.
The Force of Friction Friction opposes motion between two surfaces that touch each other. The amount of friction depends on.....
What is friction? Friction is the force that opposes the motion of an object Friction is when two things rub against each other If you push a book across.
Force Physical Science 12 Basic 5
The Laws of motion.
Friction. Four Types of Friction: 1.Static Friction: -- Friction when an object is at rest. -- Due to the microscopic bumps and grooves on the two surfaces.
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