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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 • Objects at rest remain at rest • Objects in motion remain in motion UNTIL YOU APPLY A FORCE

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

9. Flight Path

10. Energy in the baseball/bat collision

11. 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/

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

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

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

15. Conservation of Momentum

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

17. 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

18. Air Resistance (drag)

19. FRICTION

20. Resistance & Friction

21. The Power of Spin

22. Spins in Figure Skating

23. Spins in Figure Skating

24. Reaction Time

25. Downhill skier speed: 80 mph

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

27. Measure your reaction time…

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

29. 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!

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

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

32. The Physics of Sports

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