The Physics of Sports

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The Physics of Sports

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The Physics of Sports. Physics explains things that are very, very small. Physics explains things that are very, very large. Physics explains things that are right in front of us. Newton’s First Law. Objects at rest remain at rest Objects in motion remain in motion UNTIL YOU APPLY A FORCE. - PowerPoint PPT Presentation

Transcript of The Physics of Sports

Page 1: The Physics of Sports

The Physics of Sports

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Physics explains

things that are very,

very small.

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Physics explains things that are very, very large.

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Physics explains things that are right in front of us.

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Newton’s First Law

• Objects at rest remain at rest

• Objects in motion remain in motion

UNTIL YOU APPLY A FORCE

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Newton’s Second Law

F = ma

What forces are important in sports?

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Flight Path

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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/

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Newton’s Third Law

For every action there is an equal and opposite reaction.

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Conservation of Energy

Potential Energy

Kinetic EnergyKinetic Energy

Compression Energy

Heat and Sound Energy

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Conservation of Momentum

If m1 = m2 , then v1 = v2

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• Ball material, size, shape, and texture

• Properties of the club, bat, racquet, or stick

Equipment features

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How fast can you throw a

ball?

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Momentum transferredEnergy stored and released

David Rawlings, PGA Golf Professionalhttp://golflessonslondon.wordpress.com/

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Hockey Slap Shot

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

Pole Vault Progress

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Air Resistance (drag)

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FRICTION

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Resistance & Friction

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The Power of Spin

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Spins in Figure Skating

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Reaction Time

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Downhill skier speed: 80 mph

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Reaction Time in Baseball

Courtesy of R. Adair through A. Nathan.

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Measure your reaction time…

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Compare your reaction time…

Equation used: t = √((2d)/g)

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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!

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Visit Fermilabwww.fnal.gov

• Buffalo viewing

• Bicycling

• Walking

• Roller blading

• Canoeing

• Fishing

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Visit Fermilab

• Lederman Science Center

• Tours

• Saturday morning physics

• Ask a Scientist

On-line activities:ed.fnal.gov

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The Physics of Sports