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5.2 Friction

5.2 Friction. https://www.youtube.com/watch?v=MAqrWvkBoHk. What is friction?. Friction is a force that resists motion. What is friction?. Direct Contact force (between two objects) Works in the opposite direction of motion Causes objects to slow down. What is friction?.

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5.2 Friction

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  1. 5.2 Friction https://www.youtube.com/watch?v=MAqrWvkBoHk

  2. What is friction? • Friction is a force that resistsmotion

  3. What is friction? • Direct Contact force (between two objects) • Works in the opposite direction of motion • Causes objects to slow down

  4. What is friction? • Friction depends on properties of the two objects in contact. • Heavier (greater weight) objects tend to have more friction

  5. What is friction? • Friction depends on properties of the two objects in contact. • Rougher surfaces have more friction than smooth surfaces -grooves in a tire increase friction with the road

  6. Friction and Energy • Friction changes the energy of motion to heat

  7. Five major types of friction • Static – keeps an object at rest from moving • Examples: a couch, a desk • Sliding – resists dry sliding motion • Examples: sledding, skiing • Rolling – resists dry rolling motion • Examples: cars, skateboards, bikes

  8. Five major types of friction • Air – resists motion through the air • Examples: Sky diving, hot air balloons, birds • Viscous – resists motion through water • Examples: Scuba diving, swimming, fish

  9. Friction Exit Slip C Match the type of friction with the letter of the picture. • Rolling friction ___ • Air friction ___ • Sliding friction ___ • Viscous friction ___ • Static friction ___ B D A E

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