Inquiry Into Physics
8th Edition
ISBN: 9781305959422
Author: Ostdiek, Vern J.
Publisher: Cengage Learning,
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Chapter 3, Problem 7Q
(Indicates a review question, which means it requires only a basic understanding of the material to answer. Questions without this designation typically require integrating or extending the concepts presented thus far.)
If we know that a force of 5 N acts on an object while it moves 2 meters, can we calculate how much work was done with no other information? Explain.
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Suppose that 3 J of work is needed to stretch a spring from its natural length of 26 cm to a length of 44 cm.(a) How much work is needed to stretch the spring from 34 cm to 36 cm? (Round your answer to two decimal places.)
(b) How far beyond its natural length will a force of 20 N keep the spring stretched? (Round your answer one decimal place.)
Suppose that 4 J of work is needed to stretch a spring from its natural length of 36 cm to a length of 44 cm.
(a) How much work is needed to stretch the spring from 40 cm to 42 cm? (Round your answer to two decimal places.)
(b) How far beyond its natural length will a force of 20 N keep the spring stretched? (Round your answer one decimal place.)
cm
Chapter 3 Solutions
Inquiry Into Physics
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