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Introduction

Introduction. “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. What do we do in physics?.

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Introduction

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Presentation Transcript

  1. Introduction • “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

  2. What do we do in physics? • 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

  3. Two Main Classifications • 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

  4. In this class • 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

  5. Course Notables • Grades are based on tests (~75%), labs (~15%), and homework (~10%)‏

  6. Website • http://www.lusd.org/

  7. Behavior • Be respectful • Be prepared • Follow all safety rules and teacher directions

  8. Materials Needed • Textbook • Calculator • Pen and pencil • Notebook with paper

  9. How is it done? • 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

  10. The Foot Equation What is a mathematical relationship between foot size and height?

  11. Collect the data • 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

  12. Graph It • Plot a graph of foot size vs. height • Do not connect the dots • Place the independent variable on the x-axis

  13. Model It • Use a “best fit line” for the data – also known as a regression line • Calculator will be used to find this line

  14. Use it • 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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