1. The problem statement, all variables and given/known data A man pushes on a 30.0kg crate 4.50 meters at a constant velocity. The floor has a coefficient of kinetic friction of 0.250. How much work does the man's force do on the crate. 2. Relevant equations W = F*d, ƩFx = F(push) - F(friction) = 0 3. The attempt at a solution W = F*d, where F = 0.25*30.0kg*9.81m/s^2*4.50m W = 331 joules My book has 333 joules, is my book wrong? If not, where are they getting the extra joules?