A wooden crate falls out of the back of a contractor's truck. When it lands on the concrete road, it begins sliding and friction causes it to slow down. If the crate has a mass of LaTeX: 21 21 kg and the force of friction is LaTeX: 128 128 N, what is the coefficient of kinetic friction between the wood crate and the concrete road? LaTeX: \mu_{k} = 0.62 LaTeX: \mu_{k} = 0.02 LaTeX: \mu_{k} = 0.16 LaTeX: \mu_{k} = 0.54