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The Physics of Sports Geneva Middle School 25 February 2010

The Physics of Sports Geneva Middle School 25 February 2010. Physics explains things that are very, very small. Fermilab Accelerator Complex. Main Injector, 2 miles around. Tevatron, 4 miles around. Physics explains things that are very, very large.

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The Physics of Sports Geneva Middle School 25 February 2010

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  1. The Physics of SportsGeneva Middle School25 February 2010

  2. Physics explains things that are very, very small.

  3. Fermilab Accelerator Complex Main Injector, 2 miles around Tevatron, 4 miles around

  4. Physics explains things that are very, very large.

  5. Physics explains things that are right in front of us.

  6. Newton’s First Law • Objects at rest remain at rest • Objects in motion remain in motion UNTIL YOU APPLY A FORCE

  7. Newton’s Second Law F = ma What forces are important in sports?

  8. Flight Path

  9. The Home Run Swing • Ball arrives on 100 downward trajectory • Andre Dawson and Frank Thomas swing up at 250 • Ball takes off at 350 • The optimum home run angle! Courtesy of A. Nathan, University of Illinois. http://www.npl.uiuc.edu/~a-nathan/pob/

  10. Newton’s Third Law For every action there is an equal and opposite reaction.

  11. Conservation of Energy Potential Energy Kinetic Energy Kinetic Energy Compression Energy Heat and Sound Energy

  12. Conservation of Momentum If m1 = m2, then v1 = v2

  13. Equipment features • Ball material, size, shape, and texture • Properties of the club, bat, racquet, or stick

  14. How fast can you throw a ball?

  15. Momentum transferredEnergy stored and released David Rawlings, PGA Golf Professional http://golflessonslondon.wordpress.com/

  16. Hockey Slap Shot

  17. Pole Vault Progress http://ffden-2.phys.uaf.edu/211_fall2002.web.dir/Daniel_Lenord/vault.html

  18. Air Resistance (drag)

  19. FRICTION

  20. Resistance & Friction

  21. The Power of Spin

  22. Spins in Figure Skating

  23. Reaction Time

  24. Downhill skier speed: 80 mph

  25. Reaction Time in Baseball Courtesy of R. Adair through A. Nathan.

  26. Measure your reaction time…

  27. Compare your reaction time… Equation used: t = √((2d)/g)

  28. Physical laws explain the world • Newton’s Laws of Motion • Conservation of Energy • Conservation of Momentum These laws help us explain everything about sports, but there is more to learn. Physics really is everywhere!

  29. Visit Fermilabwww.fnal.gov • Buffalo viewing • Bicycling • Walking • Roller blading • Canoeing • Fishing

  30. Visit Fermilab • Lederman Science Center • Tours • Saturday morning physics • Ask a Scientist On-line activities: ed.fnal.gov

  31. The Physics of Sports

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