1. The problem statement, all variables and given/known data If you use a horizontal force of 30.0N to slide a 12.0-kg wooden crate across a floor at a constant velocity, what is the coefficient of kinetic friction between the crate and the floor? 2. Relevant equations Ff=[tex]\mu[/tex]kFN 3. The attempt at a solution I thought maybe it would be 30.0N=[tex]\mu[/tex]k(12.0kg)(9.8m/s290, but I dunno if that's right. Is 30N the force of friction? Please help me!