1. The problem statement, all variables and given/known data A 1.7 kg book is lying on a 0.99-m-high table. You pick it up and place it on a bookshelf 2.43 m above the floor. How much work does gravity do on the book 2. Relevant equations Wmg=mgYi-mgYf 3. The attempt at a solution I thought that is the correct equation so I simply just plugged and chugged but it came out wrong. What did I do wrong?