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324 Chapter 7 Conservation of Energy and an Introduction to Energy and Work
(b) Explain why the work done by the exter- (c) Design procedures to collect and analyze data to test
nal force on the springs attached in series the claim in part (a). Include a careful description of
is the sum of work done on each of the methods to be used to measure length.
springs.
You are provided with several weights with
known mass, a ruler, and several identical
springs with unknown spring constant that
can be connected end-to-end, as shown.
WHAT DID YOU LEARN?
Prep for the
Exam
AP
®
Relevant section
Chapter learning goals Section(s) Related example(s) review exercises
Explain what it means for a quantity to be conserved. 7-1 7-1 1
7-2
Describe what conditions must be met for work to be done on an 7-2 7-1, 7-2 1, 3
object, for both positive and negative work.
Explain the relationship between work and kinetic energy for an object. 7-3 7-3 2, 3, 6
Explain why something modeled as an object can have only kinetic 7-4 7-4 2, 3, 4
energy, and why a system can have other types of energy.
Describe how the work-energy theorem relates to conservation of 7-5 7-6, 7-7 3, 5, 7
energy for an object or a system.
Explain the meaning of potential energy and how conservative 7-6 7-8 2, 5
interactions, such as those described by the gravitational and
spring forces, give rise to potential energy.
Recognize why the work-energy theorem applies even for curved 7-5 7-6, 7-7 1, 2, 3, 7
paths and varying forces such as the spring force.
Chapter 7 Review
Key Terms
All the Key Terms can be found in the Glossary/Glosario on page G1 in the back of the book.
closed, isolated system 287 internal energy 289 spring potential energy 322
conservation 286 joule 290 translational kinetic energy 300
conservation law 287 kinetic energy 288 work 287
conservative force 316 law of conservation of energy 287 work-energy theorem 298
energy 287 nonconservative force 316
gravitational potential energy 318 potential energy 288
Uncorrected proofs have been used in this sample. Copyright © Bedford, Freeman & Worth Publishers.
Distributed by Bedford, Freeman & Worth Publishers. For review purposes only. Not for redistribution.
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