1. The problem statement, all variables and given/known data Jennifer lifts a 2.5 kg carton of cat litter from the floor to a height of 0.75 m. (a) How much total work is done on the carton during this operation? 2. Relevant equations Work=PE=mg.y 3. The attempt at a solution Work = 2.5kg*9.8m/s^2*0.57m= 18.4J However the answer in the back of the book is 0???? I don't know how they get to that answer??? Please help!