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Friction
 

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 Friction Presentation Transcript

  • Friction
  • 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 means…goes against
  • Frictionis aforce that occurswhen 2 surfacesoppose eachother.
  • Rub your handstogether toproduce friction.
  • Types of friction  There are four types of friction  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. Moving day—pushing a box across the floor
  • Rolling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.  Stirringa thick batter  Walking through water  Olimpic swimmers