posted by Taylor .
A student librarian picks up a 2.2 kg book from the floor to a height of 1.10 m. He carries the book 7.8 m to the stacks and places the book on a shelf that is 0.35 m above the floor. How much work does he do on the book?
Can you calculate the total number of meters he raises the book? Multiply that by the book's weight (not the mass) for the answer you seek.