Question

In a certain library the first shelf is 15.0 cmcm off the ground, and the remaining four shelves are each spaced 29.0 cmcm above the previous one. If the average book has a mass of 1.50 kg with a height of 21.0 cmcm , and an average shelf holds 27 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?

Express your answer to three significant figures and include the appropriate units.

Answer 1