Friction. Friction is a force that opposes motion Friction can never cause motion Friction can prevent motion or inhibit the continuation of motion Friction.

Slides:

Advertisements

Similar presentations

Newton’s 1 st and 3 rd Laws. How do you start and stop the motion of an object?

Advertisements

5. Using Newton’s Laws. Newton’s Third Law 3 Law of Action and Reaction Forces always occur in equal and opposite pairs A B A acts on B B acts on A.

Apparent Weight.

“ If I have seen farther than others, it is because I have stood on the shoulders of giants.” Sir Isaac Newton (1642 – 1727) Physicist.

Newton’s Laws of Motion - 2. Multiple Objects – Example with m 2 > m 1 Draw free body diagrams for each object. In magnitude, a 1 = a 2.

READING QUIZ The friction that exist between two contacting surfaces in the absence of lubrication is called _________. A) fluid friction B) normal friction.

Chapter 5 The Laws of Motion. Forces Usually think of a force as a push or pull Usually think of a force as a push or pull Vector quantity Vector quantity.

ISAAC NEWTON AND THE FORCE Dynamics. Kinematics vs Dynamics Kinematics – the study of how stuff move  Velocity, acceleration, displacement, vector analysis.

Friction Acts in direction of plane (i.e. up or down the table) Factors affecting friction Limiting friction F lim =  R.

Friction There are many forms of friction. This lesson introduces the force laws for static friction, kinetic friction, and rolling friction. Students.

More Newton’s Laws Applications

© 2007 Pearson Prentice Hall This work is protected by United States copyright laws and is provided solely for the use of instructors in teaching their.

Forces Mass, Weight, and Friction. Weight Weight: force of gravity on an object - on Earth your weight is a direct measure of the planet’s force pulling.

There are two types of friction. Both always oppose motion. When you pushed your book across the desk, it experienced a type of friction that acts on moving.

Nahdir Austin Honors Physics Period 2.  Force: A push or pull on an object (something that can accelerate objects.  A force is measured by a Newton.

Forces Unit 2 Chapter What is a Force? A force can cause a resting object to move, or it can accelerate a moving object by changing the object’s.

$200 $300 $400 $500 $100 $200 $300 $400 $500 $100 $200 $300 $400 $500 $100 $200 $ 300 $400 $500 $100 $200 $300 $400 $500 $100 What is a Force? Newton’s.

JEOPARDY Force and motion. Force Motion 2 Motion 2 Newton’s Laws Newton’s Laws of Motion of Motion Newton’s Laws Newton’s Laws of Motion 2 of Motion 2.

Newton’s 2 nd Law. Enduring Understanding: Studying dynamics (causes of motion) has had a profound effect on the way humans view their world. Essential.

Forces & Motion The Force of Friction. Frictional Forces Frictional forces arise from complex interactions between the surfaces of objects. Even very.

Newton’s Laws of Motion

What is a Force? A force is a push or a pull causing a change in velocity or causing deformation.

FORCE. A FORCE IS A PUSH OR A PULL. IF FORCES ARE POWERFUL ENOUGH, THEY MAY RESULT IN MOTION.  What is a force?

Sir Isaac Newton Newton’s Laws of Motion Newton’s 1st Law of Motion -An object at rest, will remain at rest, unless acted upon by an unbalanced.

Notes Force. Force is a push or pull exerted on some object. Forces cause changes in velocity. The SI unit for force is the Newton. 1 Newton = 1 kg m/s.

4-4: Everyday Forces Objectives: Explain the difference between mass and weight Find the direction and magnitude of the normal force Describe air resistance.

Motion and Forces Review

REVISION NEWTON’S LAW. NEWTON'S UNIVERSAL GRAVITATION LAW Each body in the universe attracts every other body with a force that is directly proportional.

The Laws of Motion. Classical Mechanics Describes the relationship between the motion of objects in our everyday world and the forces acting on them Describes.

Newton’s Second Law of Motion – Force & Acceleration

Friction: Friction: from book, ever present resistance to motion whenever two materials are in contact with each other. Friction: (ME) Two surfaces rubbing.

Friction. Consider An Object Coming to Rest Aristotle’s idea: Rest is the “natural state” of terrestrial objects Newton’s view: A moving object comes.

Writing Prompt: 10/25/2006 How much work is done to lift a 40 N weight 2 meters in the air? How much potential energy does it have after the lift?

© 2007 Pearson Prentice Hall This work is protected by United States copyright laws and is provided solely for the use of instructors in teaching their.

 Force: A push or a pull Describes why objects move Defined by Sir Isaac Newton.

Forces and Motion Unit Test Study Guide

Work Potpourri Simple Machines Machines Power

Mechanics 1 Friction.

REVISION NEWTON’S LAW. Quantity with magnitude and direction. e.g. displacement, velocity, acceleration, force and weight.. VECTOR Quantity having only.

Friction Honors Physics. What we know.. 1.It’s a force! 2.It opposes motion 3.It requires contact 4.It is somehow related to the normal force..

Notes: Friction Static friction (F s ) is the force that opposes initial motion between two contacting surfaces. (standing friction) When a force is applied.

Physical Science Mr. Barry. F=ma  As you’ve learned from Newton’s 2 nd Law, Force can be found by multiplying mass and acceleration  Reactionary Forces.

Welcome to Keyboarding JEOPARDY KEYBOARDING Final Jeopardy Question Newton’s Laws Vertical forces 100 Forces General friction

Everyday Forces Chapter 4 Section 4 Page 141. Weight vs. Mass … What’s the Difference?  Weight takes into account the force of gravity  Imagine holding.

Describing Motion Newton’s Laws. First we need to define the word FORCE: A push or a pull exerted on an object in order to change the motion of the object.

Notes: Friction Static friction (Fs) is the force that opposes initial motion between two contacting surfaces. (standing friction) When a force is applied.

Physics 1 – Nov 1, 2016 P3 Challenge –

Do Now: True or False? Justify!

Frictional Forces.

Miscellaneous Forces.

Wednesday January 14.

Newton’s Laws Acceleration

Section 5.8: Friction.

Topic: Force Physics 231.

Sign in Handouts Phones up

Chapter 4 Forces.

Forces & Motion Vocabulary

Newton’s Laws of Motion

Forces May they be with you .

Friction and Normal Force

Forces and Newton’s Laws of Motion

How to draw, read, and work with free body diagrams.

4 – 3 Newton’s 3rd Law.

Section 5.8: Friction.

Newton's Second Law F=m/a Static Friction Sliding Friction

Physics 1 – Nov 2, 2017 P3 Challenge –

Presentation transcript:

Friction

Friction is a force that opposes motion Friction can never cause motion Friction can prevent motion or inhibit the continuation of motion Friction can only occur when two surfaces are in contact

Friction According to Newton’s 3 rd law, if a force is applied to an object at rest, two things can occur The object will remain at rest if there is enough friction If no motion occurs, then the action force (force applied) must be equal and opposite the reactionary force (force of friction)

Friction and Free Body Diagrams Friction is a reaction force according to Newton’s 3 rd Law

Static Friction Static friction is occurs when an object is not in motion As an object is pushed, the friction pushes back with an equal but opposite force F A = -F f As the applied force increases, so does the force of friction.

Force of friction static max What happens when the applied force finally starts to move the object? This means that there is a “give point” or a “point of maximum stickiness” due to the static friction This maximum is called the force of friction static max It is symbolized by F fsmax

Calculating F fsmax F fsmax can be calculated if we know something about the surface contact. Scientist measured the stickiness of surfaces to find relationships of the surface contact to the force of friction The coefficient of static friction is the factor that lets us calculate that maximum stickiness Mu (  s ) is the symbol of the coefficient of static friction

Coefficient of Static Friction Only used to tell if an object is moving or not It is unit-less It is usually given in a problem or calculated from the information given in a problem There are large data bases filled with coefficients of friction.

Friction and Free Body Diagrams Is it moving? Does the applied force exceed the F fsmax ?

Friction and Free Body Diagrams Is it moving?