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?

Answer 1

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.