Transcript What is Physics PowerPoint

What is Physics?
Physics Defined
The dictionary definition of physics is
“the study of matter, energy,
and the interaction between
them”,
but what that really means is that physics is about
asking fundamental questions and trying to answer
them by observing and experimenting. physics.org
What is studied in physics? Holt Physics
The Physics of Cars Holt Physics
Without knowledge of many of the areas of physics,
making cars would be impossible.
Did you know?
Did you know?
(40 kg is about 88 pounds)
Did you know?
Did you know?
The tonne is also known as the metric ton.
It is equal to 1000 kg or about 2,205 pounds.
Did you know?
What will we study in
this course?
The Scientific Method
Question, Research, Hypothesize,
Experiment, Observe, Record Data,
Conclude, Publish.
Mars Rover
“Opportunity”
Measurement
• SI units – standard measurement for
science
Meter-Kilogram-Second
• Dimensional analysis – conversions
between units
• Accuracy and precision – experimental
error, significant figures
Measurement
• Scientific Notation & Orders of
Magnitude
Motion: One Dimension
• Velocity and Displacement
• Acceleration
• Falling Objects
Motion: Two Dimensions
• Vectors
• Projectile Motion
Forces and the Laws of Motion
• Newton’s Laws of Motion
Seatbelts are good!
• Friction
Thermography
of Front Disk
Brakes
Work and Energy
• When is work done.
• Kinetic &
Potential
Energy
• Conservation of Energy
• Forms of Energy
• Power
Momentum and Collisions
Gaining momentum
• Momentum and Impulse
• Conservation of
Momentum
• Elastic and Inelastic Collisions
Elastic
collision
Circular Motion and Gravitation
• Centripetal Acceleration
• Centripetal force
• Newton’s Law of
Gravitation
Vibrations and Waves
• Simple Harmonic Motion
• Properties of Waves
• Wave Interactions
Sound
• Sound Waves
• Doppler Effect
• Intensity
• Harmonics
Light and Reflection
• Characteristics
of Light
• Mirrors
• Color
Light and Refraction
• Explaining Refraction
• Index & Angle of
Refraction
• Lenses
“Pillars of Creation” Eagle nebula (taken by Hubble Space
Telescope 4-1-95). The gas and dust here are creating new
stars.
Electricity Energy & Current
• Electric Charges &
Electric force Coulomb’s Law
• Batteries and Potential
Difference
• Current and Resistance
(Ohm’s Law)
• Capacitance
OLD TVs can be Dangerous!
A CRT acts like a high voltage
capacitor and it can hold a lethal
charge. The charge stored in the
CRT can last a very long time,
usually a few months, sometimes
for a few years...
Electrical Circuits
• Schematics
• Series and Parallel circuits
Magnetism
• Magnetic Fields
• Electromagnets
• Magnetic force
Electromagnetic Induction
• Generators
• Motors
• Transformers
• Electromagnetic
Spectrum
A Simple DC Motor Project