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Introduction to Friction and Energy: Understanding the Force That Slows Down Motion

Learn about friction, a force that resists motion, its types including static, sliding, rolling, air, and viscous, and how it affects objects in contact. Discover how friction converts motion energy into heat. Test your knowledge with a friction exit slip!

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Introduction to Friction and Energy: Understanding the Force That Slows Down Motion

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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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