Welcome to Physics 432 Mr. Goznikar [email protected].

Welcome to Physics 432Welcome to Physics 432

Mr. GoznikarMr. Goznikar

[email protected]@d211.org

What is technology?What is technology?What is science?What is science?

Science is a Science is a processprocess which which involves involves analyzinganalyzing data, data, discovering facts and relationships discovering facts and relationships between observable phenomenon, between observable phenomenon, and and organizingorganizing this information this information into theories and laws.into theories and laws.

The process often involves The process often involves communication communication andand collaborationcollaboration with others. with others.

Skills employers look for:Skills employers look for:

Communication SkillsCommunication SkillsAnalytical SkillsAnalytical Skills

Interpersonal skillsInterpersonal skillsOrganizational SkillsOrganizational Skills

What differentiates physics What differentiates physics from the other sciences?from the other sciences?

Well, …Chemistry is about how matter is put Well, …Chemistry is about how matter is put together and combines to form the together and combines to form the

materials around us. materials around us.

Biology is still more complex, and involves Biology is still more complex, and involves live systems of matter.live systems of matter.

Physics involves the investigation of natural Physics involves the investigation of natural phenomenon such as motion, forces, phenomenon such as motion, forces,

matter, energy, light, heat, sound, radiation, matter, energy, light, heat, sound, radiation, the composition of atoms and sub-atomic the composition of atoms and sub-atomic

particles, etc. particles, etc. So, physics is the most basic science and a So, physics is the most basic science and a solid understanding of physics leads to a solid understanding of physics leads to a

better understanding of the other sciences.better understanding of the other sciences.

In this class, all of you will be In this class, all of you will be physicists. You will be physicists. You will be

classifying, testing hypotheses, classifying, testing hypotheses, looking for relationships looking for relationships

between observable variables, between observable variables, developing and testing developing and testing

theories, and often theories, and often representing your conclusions representing your conclusions with a mathematical formula.with a mathematical formula.

Although physics is the most fundamental Although physics is the most fundamental science, for some it is not often the easiest. science, for some it is not often the easiest. Perhaps this is because we all have ideas Perhaps this is because we all have ideas about how the world around us works – our about how the world around us works – our

concept of nature. Science forces us to concept of nature. Science forces us to challenge these concepts. When our current challenge these concepts. When our current

understanding turns out to be incorrect, these understanding turns out to be incorrect, these conceptions are then really mis-conceptions conceptions are then really mis-conceptions

and are difficult to change. and are difficult to change.

The processes of collecting, organizing, The processes of collecting, organizing, analyzing, collecting data, and forming analyzing, collecting data, and forming

conclusions becomes easier with practice. conclusions becomes easier with practice.

Let’s start classifying Let’s start classifying familiar concepts… Consider familiar concepts… Consider

the concept of motion. It the concept of motion. It turns out that there are two turns out that there are two

different kinds different kinds (classifications) of motion.(classifications) of motion.

What do you think these What do you think these two kinds are?two kinds are?

The two classifications are:The two classifications are:

1. 1.

2. 2.

The two classifications are:The two classifications are:

1. Objects which move with 1. Objects which move with a constant velocity. a constant velocity.

2. Objects which change 2. Objects which change their velocity.their velocity.

SPEED may be defined as the SPEED may be defined as the rate at which an object’s rate at which an object’s

distance changes per some time distance changes per some time interval.interval.

VELOCITY is speed in a specific VELOCITY is speed in a specific direction.direction.

ACCELERATION may be defined ACCELERATION may be defined as the change in speed, or as the change in speed, or

direction, or both.direction, or both.

Let’s consider some Let’s consider some examples.examples.