Intro to Physics Mrs' Coyle

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Intro to PhysicsMrs. Coyle

• Physics is the study of the physical world
• including motion, energy, light, electricity,
  magnetism, sound etc.

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Physics
Golden Gate Bridge

• Mechanics
• Kinematics (motion)
• Statics, Dynamics (forces)
• Electricity
• Magnetism
• Waves
• Optics (geometric optics)
• Nuclear Physics (Modern Physics)

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Physics

• The most basic science.
• The foundation of other sciences

• What?
• Why?
• How?
• When?

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Aristotle (Greek 4th Century BC)

• Logic
• Studied motion
• Natural and violent motion
• 4 elements
• earth, water, air, fire
• Geocentric view
• Aristarchos(310-230 BC), disagreed and believed
  in heliocentric view.

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Democritus

• Greek who devised the first atomic theory.

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Galileo Galilei (1564 AD)

• Father of the scientific method (along with the
  Englishman Francis Bacon 1500s).
• Studied motion.
• Agreed with the Greek Aristarchos and Polish
  Copernicus (1473-1543) on heliocentric view
  point. This lead to his house arrest.

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Isaac Newton

• English (1642-1727) related force and motion and
  studied light.

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A Glance at Some Scientists who Studied
Electricity and Magnetism

• American Benjamin Franklin (1706-1790),
  experimented with electricity.
• Michael Faraday (1791-1867), English with a
  grammar school education,
• found that a moving magnet induces electric
  current to flow.

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The BIG Guy

• Albert Einstein (1879-1955)
• Relativity there is no absolute frame of
  reference that is at rest.
• Photoelectric effect (Light is quantized) (Nobel
  Prize)
• Related mass and energy Emc2

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The Scientific Method

• Steps followed during scientific investigations.

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Scientific Method

• Recognize a problem
• Hypothesis- educated guess, testable
• When tested and confirmed becomes a law
• Observation -measurement, data collection
  (experiment)
• Theory information including tested hypothesis
• Conclusion

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Law or Principle

• A hypothesis that has been repeatedly tested and
  not contradicted.
• Laws change or are abandoned when contradicted.

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Scientific Fact

• Observation
• May change

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Science and Technology

• Science ? Pure
• Technology ? Applied

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Math and Units

• Math- the language of Physics
• Units SI International System
• Basic Units MKS
• Meter m
• Mass kg
• Time s
• National Bureau of Standards
• Prefixes