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During an etiquette class, you walk slowly and steadily at

Chapter 10, Problem 1P

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QUESTION:

During an etiquette class, you walk slowly and steadily at 0.20 m/s for 2.5 m with a 0.75 kg book balanced on top of your head. How much work does your head do on the book?

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QUESTION:

During an etiquette class, you walk slowly and steadily at 0.20 m/s for 2.5 m with a 0.75 kg book balanced on top of your head. How much work does your head do on the book?

ANSWER:

Step 1 of 2

The force applied on the book by head is in vertical direction and the person moves in horizontal direction. Therefore, the angle between the direction and motion and the force applied is 90 degrees. 

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