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# Friction

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• Friction makes it possible : To walk Use wheeled vehicles Sit Hold books
• WHAT IS FRICTION? A force that opposes motion • What does oppose mean??? • Oppose
• Friction is a force that occurs when 2 surfaces oppose each other.
• Rub your hands together to produce friction.
• THERE ARE FOUR TYPES OF FRICTION. THE DIFFERENT Types of friction ARE: Static Sliding Rolling Fluid
• STATIC: Friction that acts on something that is not moving Piano is held in place by static friction Static friction keeps you in your seat
• SLIDING: Force resulting when pushing or pulling an object over a surface. Pushing a box across the floor Heat and wear can result
• ROLLING FRICTION Contact is reduced because of rollers or wheels or ball bearings. Skate boards have ball bearings in the wheels. A cart has wheels.
• FLUID FRICTION Resistance from a “liquid” or air. Stirring a thick batter Walking through water OLIMPIC SWIMMERS AS THE ONE IN THE PICTURE
• ### Friction

1. 1. Friction
2. 2. Friction makes it possible:To walkUse wheeled vehiclesSitHold books
3. 3. WHAT IS FRICTION? A force that opposes motion  • What does oppose mean???  • Oppose means…goes against
4. 4. Frictionis aforce that occurswhen 2 surfacesoppose eachother.
5. 5. Rub your handstogether toproduce friction.
6. 6. Types of friction  There are four types of friction  Static  Sliding  Rolling  Fluid
7. 7. Static Friction that acts on something that is not moving  Piano is held in place by static friction  Static friction keeps you in your seat
8. 8. SlidingForce resulting when pushing or pulling an object over a surface. Moving day—pushing a box across the floor
9. 9. RollingContact is reduced because of rollers or wheels or ball bearings. Skate boards have ball bearings in the wheels. A cart has wheels.
10. 10. Fluid friction Resistance from a “liquid” or air.  Stirringa thick batter  Walking through water  Olimpic swimmers