posted by katie .
A student librarian picks up a 2.2 kg book from the floor to a height of 1.15 m. He carries the book 8.0 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?
how do i do this??
(2.2 x 0.35)g Joules. Don't forget the g = 9.8 m/s^s. Only the elevation change (final - initial) matters when calculating the work done.