Friction. Friction  Friction is defined as a force that opposes the motion of objects that touch as they move past each other. Friction is the interaction.

Slides:



Advertisements
Similar presentations
Friction and Gravity.
Advertisements

Friction.
How does friction affect motion?
FORCES AND FRICTION.
Chapter 5.2 Friction at the Sochi Winter Olympics.
Friction.
Why does the box stop? F=MA.
FORCES Lesson 1 Friction and Gravity. What is a Force? (p.44) A push or a pull on an object in a particular direction.
Friction.
 Record your HW in your agenda  Update your table of contents:  Fold and attach the notes to page 151.  Test your table members:  What is the difference.
Friction Every day you see moving objects come to a stop. The force that brings nearly everything to a stop is friction FRICTION is the force that acts.
"The most beautiful thing we can experience is the mysterious... It is the source of all true art and all science." - Einstein.
Everything You Have Ever WANTED To Know About FRICTION Chapter 5 Lect 4 Section 3.
Friction and Gravity.
Chapter 3 Forces.
TYPES OF FORCES AND FRICTION Forces.  A force is a push or a pull that acts on an object  A force can cause a resting object to move or it can accelerate.
Friction The forces that two surfaces exert on each other when they rub against each other is called friction. The strength of the force of friction depends.
Friction: A Force That Opposes Motion
Section 1 (Part 2): Types of Friction
What Causes Friction? Even though a surface may look smooth, if you magnify the surface, you’ll see it isn’t smooth at all. Everything is made of molecules.
Chapter 2, Section 3 Friction. Friction Definition: a force that opposes motion between two surfaces that touch. Example: Tires on a street.
Force Physical Science 12 Basic 5
Forces 12.1 Pg FORCE: A push or a pull that acts on an object Can cause a resting object to move, or it can accelerate a moving object by changing.
Types of Friction.
Friction
FRICTION. Friction A force that acts in a direction opposite to the motion Will cause a moving object to slow down and finally stop.
The Force of Friction Friction opposes motion between two surfaces that touch each other. The amount of friction depends on.....
 Describe how forces act upon objects and create motion  Describe how friction influences the motion  Explain the different types of friction  Explain.
 This section introduces and describes friction.  You will explore the types of friction and study examples of each.
C. Friction Friction  force that opposes motion between 2 surfaces  depends on the: types of surfaces force between the surfaces.
Sci. 1-3 Friction: A Force that Opposes Motion Pages
 Warm Up 20 newtons North40 newtons South What is the net force?
Physical Science Chapter 12 Matter in Motion Measuring Motion An objects change in position over time when compared to a reference point.
Friction is a force between two surfaces that are sliding, or trying to slide across one another, for example when you try to push a toy car along the.
Is it useful or a nuisance?
Lesson 6 Objectives Observe the properties of sliding friction. Measure the force of friction on a wooden block pulled across different surfaces. Measure.
Friction. Motion stops because… Definition A FORCE that opposes the motion of objects as they SLIDE past one another. Why didn’t the balloon cars roll.
Entry: Date: Friction Pg P2A1.
The rubbing of one object or surface against another.
Everything You Have Ever WANTED To Know About FRICTION
How does friction affect motion?
Friction.
How does friction affect motion?
How does friction affect motion?
MOTION & FORCE.
Forces to recon with!.
FRICTION.
FORCES Lesson 1 Friction and Gravity.
FRICTION Notes!.
How does friction affect motion?
Friction - An introduction.
FORCES Lesson 1 Friction and Gravity.
Motion And Forces.
How does friction affect motion?
Types of Friction.
How does friction affect motion?
Types of Friction.
How does friction affect motion?
FORCES Lesson 3 Friction and Gravity.
Friction.
How does friction affect motion?
Friction Force 12-1.
How does friction affect motion?
What is friction? Friction = force that opposes the motion of two surfaces that are touching Always happens in the direction opposite of the direction.
A force that opposes motion
5.2 Friction.
Newton's Second Law F=m/a Static Friction Sliding Friction
Chapter 3 Forces.
A force that opposes motion
How does friction affect motion?
Presentation transcript:

Friction

Friction  Friction is defined as a force that opposes the motion of objects that touch as they move past each other. Friction is the interaction between two surfaces.  There are 4 main types of friction: Static, Sliding, Rolling and Fluid.

Static Friction  Static Friction is the friction force that acts on objects that are not moving.  The object is not moving because the force of friction is greater than the force applied by natural forces or your big muscles. So…the object stays where it is. “The force that keeps an object that is not moving in its place". A vase on top of a table is an example of static friction.

Sliding Friction  Once an object starts moving, sliding friction takes over. Sliding friction opposes the movement of an object, and makes it slow down and/or stop.  For example: When you ski down a slope and end up on the flat part of the hill. It is the sliding friction that makes you stop. Sliding Friction: "the force that occurs when two objects slide against each other". An example of sliding friction is striking a match against a rough surface.

Rolling Friction  Rolling friction is the friction force that acts on rolling objects. Rolling friction is times less than the force of static or sliding friction.  Ancient people used rolling friction to move huge blocks of stone to build the pyramids. We use it today in wheels for skateboards. The bearings in the wheel provide rolling friction. Rolling Friction: "slows down the motion of an object rolling on a surface". Rolling friction slows down the motion of a tire rolling along the pavement

Fluid Friction  Fluid friction opposes the movement of an object through fluids and gases. Fluid Friction is also called air resistance.  Air resistance is the reason feathers fall so slowly. It is the reason skiers tuck when racing.  You feel fluid friction when you try to run in water. Fluid Friction: "the force that slows down an object when it travels through air or a fluid". A fish swimming in the water is an example of fluid friction.

 Friction is a beautiful thing. It is the reason we can walk, sit and move.  What would the world look like with no friction…..  When there is no friction video.asx When there is no friction video.asx When there is no friction video.asx