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The Physics of Sports

The Physics of Sports. Fermilab. Tevatron, 4 miles around. Main Injector, 2 miles around. Argonne National Laboratory. Physics explains things that are very, very large. Physics explains things that are very, very small. Physics explains things that are right in front of us.

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The Physics of Sports

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  1. The Physics of Sports

  2. Fermilab Tevatron, 4 miles around Main Injector, 2 miles around

  3. Argonne National Laboratory

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

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

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

  7. Newton’s First Law

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

  9. Newton’s First Law

  10. Objects tend to resist a change in motion. This is called:Inertia

  11. Newton’s Second Law This is an equation F = (something) X (something)

  12. Newton’s Second Law F = ma Force = mass X acceleration What forces are important in sports?

  13. Flight Path

  14. Energy in the baseball/bat collision

  15. Energy in the baseball/bat collision

  16. The Home Run Swing • Ball arrives on 100 downward trajectory • Big Mac swings 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/

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

  18. Newton’s Third Law

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

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

  21. Conservation of Momentum

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

  23. http://ffden-2.phys.uaf.edu/211_fall2002.web.dir/Daniel_Lenord/vault.htmlhttp://ffden-2.phys.uaf.edu/211_fall2002.web.dir/Daniel_Lenord/vault.html

  24. Air Resistance (drag)

  25. FRICTION

  26. Resistance & Friction

  27. The Power of Spin

  28. Spins in Figure Skating

  29. Spins in Figure Skating

  30. Reaction Time

  31. Downhill skier speed: 80 mph

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

  33. Measure your reaction time…

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

  35. Physical laws explain the world • Newton’s Laws of Motion • Conservation of Energy • Conservation of Momentum These laws help us explain everything about sports. Physics really is everywhere!

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

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

  38. The Physics of Sports

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