Phys205A_Lecture16

Physics for Scientists & Engineers with Modern Physics (4th Edition)

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Chapter 7 Energy of a System Homework 5 (from Physics for Scientists and Engineers, 7th edition) Chapter 6 Questions: 2, 6, and 13 Problems: 1, 14, 16, 19, and 50 Due date: October 3, 08 (in class) Lecture 16 Announcement: Midterm 2 will be on Friday October 3 Chapters 5,6,7
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Introduction to Energy z The concept of energy is one of the most important topics in science and engineering z Every physical process that occurs in the Universe involves energy and energy transfers or transformations z Energy is not easily defined
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Energy Approach to Problems z The energy approach to describing motion is particularly useful when Newton’s Laws are difficult or impossible to use z An approach will involve changing from a particle model to a system model z This can be extended to biological organisms, technological systems and engineering situations
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Systems z A system is a small portion of the Universe z We will ignore the details of the rest of the Universe z A critical skill is to identify the system
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Valid System Examples z A valid system may z be a single object or particle z be a collection of objects or particles z be a region of space z vary in size and shape
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Problem Solving z Categorize step of general strategy z Identify the need for a system approach z Identify the particular system z Also identify a system boundary z
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Phys205A_Lecture16 - Lecture 16 Announcement: Midterm 2...

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