Transcript Physics
Intro to Physics
Mrs. Coyle
Physics is the study of the physical world
including motion, energy, light, electricity,
magnetism, sound etc.
Golden Gate Bridge
Physics
Mechanics
Kinematics (motion)
Statics, Dynamics (forces)
Electricity
Magnetism
Waves
Optics (geometric optics)
Nuclear Physics (Modern Physics)
Physics
The most basic
science.
The foundation of
other sciences
What?
Why?
How?
When?
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.
Democritus
Greek who devised the
first atomic theory.
Galileo Galilei (1564 AD)
Father of the scientific
method (along with the
Englishman Francis
Bacon 1500’s).
Studied motion.
Agreed with the Greek
Aristarchos and Polish
Copernicus (1473-1543)
on heliocentric view
point. This lead to his
house arrest.
Isaac Newton
English (1642-1727) related force and
motion and studied light.
A Glance at Some Scientists who
Studied Electricity and Magnetism
American Benjamin Franklin (17061790), experimented with electricity.
Michael Faraday (1791-1867), English
with a grammar school education,
found that a moving magnet induces
electric current to flow.
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
E=mc2
The Scientific Method
Steps followed during scientific
investigations.
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
Law or Principle
A hypothesis that has been repeatedly
tested and not contradicted.
Laws change or are abandoned when
contradicted.
Scientific Fact
Observation
May change
Science and Technology
Science
Pure
Technology Applied
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