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(Answers to odd numbered Conceptual Questions

Chapter 7, Problem 6CQ

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QUESTION:

Problem 6CQ

(Answers to odd numbered Conceptual Questions can be found in the back of the book.)

Give an example of a frictional force doing negative work.

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QUESTION:

Problem 6CQ

(Answers to odd numbered Conceptual Questions can be found in the back of the book.)

Give an example of a frictional force doing negative work.

ANSWER:

Step 1 of 2:

A work is determined known as positive, zero, or negative based on the angle between the force and the displacement. If the angle is greater than 90° and less than 270° the work is negative. The frictional force always does a negative work as the angle is 180°.

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