Alright, I'm having some problems with this problem: Eight books, each 9.5 cm thick with mass 1.3kg, lie flat on a table. How much work is required to stack them one on tope of another? I used W = F(height) and got 1.21J, but that is wrong. So then I multiplied the height, .095m by 8 since there are eight books but that is also wrong. Any help with this would be appreciated! Thanks!