slide1 l.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Friction PowerPoint Presentation
Download Presentation
Friction

Loading in 2 Seconds...

play fullscreen
1 / 14

Friction - PowerPoint PPT Presentation


  • 162 Views
  • Uploaded on

What’s Stopping You?. F n. Mu. Friction. Hard to Live With It, Can’t Live Without It. Coefficient of Friction. Consider 2 Types of Friction. Force of Static Friction. This value represents the relative force necessary to make an object move . Force of Kinetic Friction.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Friction' - joella


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
slide1

What’s Stopping You?

Fn

Mu

Friction

Hard to Live With It, Can’t Live Without It

Coefficient of Friction

slide2

Consider 2 Types of Friction

Force of Static Friction

This value represents the relative force necessary to make an object move

Force of Kinetic Friction

This value represents the relative force necessary to keep an object moving at a constant rate

slide3

Max

Kinetic Region

Frictional ForceResisting Motion

Static Region

Force Causing the Object to Move

slide4

Frictional Forces Occur When Materials are in Contact

N

F

fs

M1

Surfaces in Contact

Spring Scale

W

F = Force Causing Motion (Pull on Scale)

Fs = Force of Static Friction (Resists Motion)

N = Force Normal Holds Surfaces in Contact

W = Weight of Object ( Mass x Gravity)

slide5

Friction is a Force That Resists Motion

N

F

fs

M1

Surfaces in Contact

Spring Scale

W

The Pink Block M1 Will not Move Until the Force F (Pull on the scale) Exceeds the Force of Static Friction fs.

slide6

The Relative Force of Static Friction Between 2 Objects is Expressed as the Quotient of the Force (F) Required to Move the Object

N

F

fs

M1

Surfaces in Contact

Spring Scale

W

Divided by the Weight W of the Object

This is Called the Coefficient of Friction

slide7

Coefficient of Static Friction

N

F

fs

M1

Surfaces in Contact

Spring Scale

W

= Coefficient of Friction

= Force Required to Cause Motion

= Weight of Object

slide11

The Coefficient of Static Friction Between the Wood Desktop and the Plastic Battery is Described Algebraically:

= 110 g

= 580 g

= .190

slide12

The Coefficient of Kinetic Friction Can be Found Using the Same Technique

Record the Force Required to Move the Battery at a Constant Rate

slide13

Coefficients of Friction Between Various Surfaces Have Significant Impact on the Design and Construction of Mechanisms.

The Design of Competitive Mechanisms with Wheels Requires Extensive Testing in Order to Optimize the Torque, Speed and Traction (Friction) of the Drive Systems.