In a certain library the first shelf is 15.0 cm off the ground, and the remaining four shelves are each spaced 38.0 cm above the previous one. If the average book has a mass of 1.40 kg with a height of 22.0 cm, and an average shelf holds 28 books (standing vertically), how much work is required to fill all the shelves, assuming the books are all laying flat on the floor to start?
The work required to fill all the shelves by books that are all lying flat on the floor.
Answer to Problem 7P
Solution:
1960J
Explanation of Solution
Given:
The first shelf is
Formula used:From work-energy theorem:
Calculation:
The height of the book is 22 cm; hence its center of mass will be at a height of 11cm.
Conclusion:
The work is required to fill all the shelves by books that are all lying flat on the floor is 1960J.
Chapter 6 Solutions
Physics: Principles with Applications
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