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Published byClaud Ellis Modified over 8 years ago
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“Physics” comes from the ancient Greek word for nature Physics is defined as the study of matter, energy, and the interactions between them; in other words, it’s the study of everything All other sciences rely on the fundamental ideas of physics
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Physics is an organized way of looking at nature Physicists ask how and why questions about nature How does an object behave as it falls? Why does an object exhibit this behavior as it falls? They look for predictable patterns as they explore these questions Turn these patterns into mathematical models (equations) that then be applied to any situation
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Classical Physics - Deals with the behavior of objects that are neither too large nor too small, which move at relatively slow speeds - Main players Galileo and Newton Modern Physics - Studies the very small or very large or objects traveling at speeds close to the speed of light - Most notable players Einstein, Bohr, deBroglie, Heisenberg, Schroedinger
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We will study classical physics The branches we will focus on are - Kinematics: description of motion - Dynamics: causes of motion - Waves: movement of energy - Sound: what sound is - Electricity: what electricity is and how it behaves
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Grades are based on tests (~75%), labs (~15%), and homework (~10%)
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http://www.lusd.org/ http://www.lusd.org/
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Be respectful Be prepared Follow all safety rules and teacher directions
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Textbook Calculator Pen and pencil Notebook with paper
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Physics looks for relationships in natural observations and represents those relationships mathematically This can be done by graphically representing data that is collected and finding a mathematical function that can represent the data A function is a math equation that shows how two variable ( x and y) relate to one another
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The Foot Equation What is a mathematical relationship between foot size and height?
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Collect data from a number of individuals on their foot size and their height When collecting data make sure to limit as many other variables as is possible Record the data in a data table
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Plot a graph of foot size vs. height Do not connect the dots Place the independent variable on the x-axis
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Use a “best fit line” for the data – also known as a regression line Calculator will be used to find this line
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What do you predict the shoe size of a 68” person to be? How tall would you predict a person with an shoe size of 7 to be?
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