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Solutions for Chapter 8: Fundamentals of Physics: 9th Edition

Fundamentals of Physics: | 9th Edition | ISBN: 9780470556535 | Authors: David Halliday; Robert Resnick; Jearl Walker

Full solutions for Fundamentals of Physics: | 9th Edition

ISBN: 9780470556535

Fundamentals of Physics: | 9th Edition | ISBN: 9780470556535 | Authors: David Halliday; Robert Resnick; Jearl Walker

Solutions for Chapter 8

Solutions for Chapter 8
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Textbook: Fundamentals of Physics:
Edition: 9
Author: David Halliday; Robert Resnick; Jearl Walker
ISBN: 9780470556535

Summary of Chapter 8:

One job of physics is to identify the different types of energy in the world, especially those that are of common importance. One general type of en- ergy is potential energy U. Technically, potential energy is energy that can be as- sociated with the configuration (arrangement) of a system of objects that exert forces on one another. This is a pretty formal definition of something that is actually familiar to you. An example might help better than the definition: A bungee-cord jumper plunges from a staging platform (Fig. 8-1). The system of objects consists of Earth and the jumper. The force between the objects is the gravitational force. The configuration of the system changes (the separation between the jumper and Earth decreases- that is, of course, the thrill of the jump). We can account for the jumper's motion and increase in kinetic energy by defining a gravitational potential energy U. This is the energy associated with the state of separation between two objects that at- tract each other by the gravitational force, here the jumper and Earth. When the jumper begins to stretch the bungee cord near the end of the plunge, the system of objects consists of the cord and the jumper. The force between the objects is an elastic (spring-like) force. The configuration of the sys- tem changes (the cord stretches). We can account for the jumper's decrease in kinetic energy and the cord's increase in length by defining an elastic potential energy U. This is the energy associated with the state of compression or extension of an elastic object, here the bungee cord. Physics determines how the potential energy of a system can be calculated so that energy might be stored or put to use. For example, before any particular bungee-cord jumper takes the plunge, someone (probably a mechanical engi- neer) must determine the correct cord to be used by calculating the gravitational and elastic potential energies that can be expected. Then the jump is only thrilling and not fatal.

Since 122 problems in chapter 8 have been answered, more than 95147 students have viewed full step-by-step solutions from this chapter. Chapter 8 includes 122 full step-by-step solutions. This textbook survival guide was created for the textbook: Fundamentals of Physics:, edition: 9. This expansive textbook survival guide covers the following chapters and their solutions. Fundamentals of Physics: was written by and is associated to the ISBN: 9780470556535.

Key Physics Terms and definitions covered in this textbook
  • //

    parallel

  • any symbol

    average (indicated by a bar over a symbol—e.g., v¯ is average velocity)

  • °C

    Celsius degree

  • °F

    Fahrenheit degree

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