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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
• ### Transcript

• 1. Friction
• 2. Friction makes it possible:&#xF06C;To walk&#xF06C;Use wheeled vehicles&#xF06C;Sit&#xF06C;Hold books
• 3. WHAT IS FRICTION? &#xF06C;A force that opposes motion &#xF06C; &#x2022; What does oppose mean??? &#xF06C; &#x2022; Oppose means&#x2026;goes against
• 4. &#xF06C;Frictionis aforce that occurswhen 2 surfacesoppose eachother.
• 5. &#xF06C;Rub your handstogether toproduce friction.
• 6. Types of friction &#xF06C; There are four types of friction &#xF06C; Static &#xF06C; Sliding &#xF06C; Rolling &#xF06C; Fluid
• 7. Static &#xF06C;Friction that acts on something that is not moving &#xF06C; Piano is held in place by static friction &#xF06C; Static friction keeps you in your seat
• 8. Sliding&#xF06C;Force resulting when pushing or pulling an object over a surface.&#xF06C; Moving day&#x2014;pushing a box across the floor
• 9. Rolling&#xF06C;Contact is reduced because of rollers or wheels or ball bearings.&#xF06C; Skate boards have ball bearings in the wheels.&#xF06C; A cart has wheels.
• 10. Fluid friction &#xF06C;Resistance from a &#x201C;liquid&#x201D; or air. &#xF06C; Stirringa thick batter &#xF06C; Walking through water &#xF06C; Olimpic swimmers